Cities are turning climate goals into action people can see
The Yearly Offer of Action is an initiative led by C40 Cities and the Global Covenant of Mayors for Climate & Energy (GCoM) that shows how cities are delivering climate action every single year.
Each year, ahead of the UN climate conference (COP), mayors set out a concrete action they’ll deliver in the next 12 months and report back on what they achieved in the last.
Global climate goals are only met when action happens on the ground. The Yearly Offer of Action shows cities are already making it happen.
A growing movement of cities delivering now
Launched at the 2025 World Mayors Summit with 42 cities, the Yearly Offer of Action has grown to 69 cities across every continent, representing 270 million people.
Their actions span clean energy, electric transport, extreme weather protection, nature-based solutions and sustainable construction.
From Bogotá’s 1,900 electric buses to Tokyo hitting its 2030 solar targets two years early, from Chennai’s 88 sponge parks to Rome’s citywide network of cooling shelters, mayors are turning ambition into real, measurable change.
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C40 Cities -
GCoM -
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Other
2027 · GCoM
Abaetetuba
Abaetetuba is planting trees
- Country
- Brazil
- Region
- Latin America
- Climate topics
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- Adaptation and resilience
- Urban nature
In 2027, Abaetetuba will expand and improve urban tree cover across streets, squares, schools, public facilities, and other priority areas, focusing on places most exposed to heat and with less vegetation.
Aside from planting more trees, Abaetetuba will improve maintenance and community participation, making the city cooler, healthier, and more climate-resilient.
2027 · C40 Cities
Abidjan
Abidjan is putting young people at the centre of climate action
- Country
- Cotê d'Ivoire
- Climate topic
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- Community
In 2027, Abidjan will fund youth-led climate projects through its new Youth and Climate Action Fund, launched with the support of Bloomberg Philanthropies. This fund will support between eight and 50 youth-led projects aimed at combating climate change in the city and, above all, placing young people at the heart of the climate response.
2027 · C40 Cities
Abidjan
Abidjan is putting young people at the centre of climate action
- Country
- Cotê d'Ivoire
- Region
- Africa
- Climate topics
-
- Adaptation and resilience
- Community
In 2027, Abidjan will fund youth-led climate projects through its new Youth and Climate Action Fund, launched with support from Bloomberg Philanthropies.
The fund will help between eight and 50 projects led by young people to tackle climate change in the city.
2027 · C40 Cities
Addis Ababa
Addis Ababa is creating green jobs through climate-focused investment
- Country
- Ethiopia
- Region
- Africa
- Climate topics
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- Early warning systems
- Just transition
- Urban nature
Addis Ababa is restoring its rivers and strengthening climate resilience
In 2027, Addis Ababa will restore urban rivers, protect riverbank communities from flooding, prevent illegal encroachment, and expand wastewater treatment. A new early warning system will pair real-time river monitoring with neighbourhood emergency training, helping riverbank households prepare before floods hit. Improved drainage, riverbank vegetation and water quality monitoring will further strengthen the city’s resilience to extreme weather events.
Addis Ababa is creating green jobs through climate-focused investment
In 2027, Addis Ababa will put green jobs at the heart of its climate investment. Through stronger public–private partnerships, the city will invest in river restoration, wastewater treatment, sustainable water management and green infrastructure. It will also expand its electric transit network and add rapid charging points at key hubs, all powered by the country’s fully renewable hydroelectric grid, to deliver Ethiopia’s ban on internal combustion engine (ICE) vehicles. These investments will open up new employment opportunities while improving water security, strengthening flood management, cutting emissions, and prioritising climate-resilient urban development
2027 · C40 Cities
Ahmedebad
Ahmedabad is electrifying its public transport
- Country
- India
- Region
- South and West Asia
- Climate topics
-
- Clean energy
- Transport
In 2027, Ahmedabad will deploy up to 1,000 new electric buses across the city and expand solar-powered charging for them.
The city is prioritising underserved neighbourhoods, villages, industrial areas and interchange hubs, cutting emissions and noise while making journeys safer and more comfortable for everyone.
2027 · C40 Cities
Athens
Athens is launching its first electric bus service
- Country
- Greece
- Region
- Europe
- Climate topic
-
- Transport
How Athens is doing it
In 2027, Athens will start rolling out ATHENS MOVE, the city’s first municipal public transport service.
17 electric buses will run on four neighbourhood routes covering 40km and 185 stops, connecting underserved areas to the metro, tram and wider bus network. The service will cut transport emissions and give residents an affordable, cleaner alternative to driving.
2027 · C40 Cities
Austin
Austin is expanding clean energy and shade
- Country
- USA
- Region
- North America
- Climate topics
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- Clean energy
- Energy and buildings
- Extreme heat
In 2027, Austin will begin one of the largest expansions of solar energy on city-owned buildings in US cities.
In the next year, Austin will complete over 25% of the overall project by adding solar installations to 40 city buildings and properties, from libraries and recreation centers to office buildings and warehouses. The city will also increase efforts to protect residents most vulnerable to extreme heat, investing in six new cool corridors.
2027 · GCoM
Barcarena
Barcarena is preparing for extreme heat
- Country
- Brazil
- Region
- Latin America
- Climate topics
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- Extreme heat
- Water
In 2027, Barcarena will develop a Heat Risk Action Plan and put its new heat risk management guidelines into action, prioritising passive cooling measures in public spaces and buildings.
The city will also improve shade and hydration to reduce the health impacts of extreme heat, with particular attention to vulnerable residents and people working outdoors.
2027 · C40 Cities
Barcelona
Barcelona is testing its readiness for extreme heat
- Country
- Spain
- Region
- Europe
- Climate topic
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- Extreme heat
In 2027, Barcelona will run ‘Barcelona at 50°C’, a citywide exercise testing how prepared the city is for extreme heat. Public authorities, health institutions and community groups will work through collaborative workshops, a decision-making exercise and a full-scale live simulation of a 50°C scenario, supported by digital tools, to uncover weak points and strengthen coordination across sectors. The lessons will directly shape future planning and investment.
2027 · GCoM
Benevides
Benevides is tackling organic waste in schools
- Country
- Brazil
- Region
- Latin America
- Climate topic
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- Waste management
In 2027, Benevides will introduce a structured organic waste management system across its 41 schools, serving around 10,741 students, with separate collection of school meal waste and a central composting unit at SEMAGRI.
The programme will turn organic waste into high-quality fertiliser for local production and the Municipal Nursery, while strengthening environmental education and technical skills across the school network.
2027 · C40 Cities
Bengaluru
Bengaluru is cooling public buildings
- Country
- India
- Region
- South and West Asia
- Climate topics
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- Energy and buildings
- Extreme heat
In 2027, Bengaluru will scale its ‘cool roof’ initiative to 45 public buildings, after pilots cut indoor temperatures by up to 5 degrees and roof surface temperatures by up to 10. Done in collaboration with the National Ministry of Housing and Urban Affairs, the rollout protects residents’ health from the growing risks of urban heat.
2027 · C40 Cities
Bogotá
Bogotá is growing its electric bus fleet
- Country
- Colombia
- Region
- Latin America
- Climate topic
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- Transport
In 2027, Bogotá will add 390 electric buses to its public transport system, bringing the total to roughly 1,900, with more vehicles set to join in the years ahead.
2026 · C40 Cities
Bogotá
Bogotá boosts climate-friendly transport
- Country
- Colombia
- Region
- Latin America
- Climate topics
-
- Electrification
- Reducing emissions
- Transport
How Bogotá is doing it
In 2026, Bogotá will boost its electric bus fleet by adding 390 new e-buses, bringing the total to 1,876. This expansion will save an additional 20,000 tons of CO2 per year, making the electric fleet’s total annual emissions reduction 100,000 tons. The city will also continue investing US $19.9 billion in sustainable infrastructure, including new projects like Metro Line 1 and 2, innovative cable cars, clean Bus Rapid Transit (BRT) lines, and the Wastewater Treatment Plant to clean the Bogotá River.
Progress made
In 2026, Bogotá procured 900 electric public buses, with 147 already deployed and 415 expected by the end of the year, making the city on track for a full fleet by 2029. Once complete, this will cut CO2e emissions by 57,477 tonnes every year, equivalent to the CO2 captured annually by 2.6 million trees.
2027 · C40 Cities
Boston
Boston is helping residents cut energy bills
- Country
- USA
- Region
- North America
- Climate topics
-
- Energy and buildings
- Just transition
In 2027, Boston is making energy upgrades easier through the Boston Energy Saver programme, offering one-on-one support to renters, homeowners and small businesses to save money and reduce emissions.
The city is deepening partnerships with community organisations so that residents hit hardest by high energy bills can get appropriate support. Boston is working towards weather-proofing 10,000 homes and installing 5,000 heat pumps by the end of the year.
2027 · C40 Cities
Buenos Aires
Buenos Aires is protecting its most vulnerable residents from extreme heat
- Country
- Argentina
- Region
- Latin America
- Climate topic
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- Extreme heat
How Buenos Aires is doing it
In 2027, Buenos Aires will roll out its extreme heat plan across the city, establishing coordination between government departments and running response drills to prepare for heatwaves.
A network of 252 cooling shelters and more than 600 drinking fountains will give residents, including over 10,000 outdoor workers, the elderly and those with heart and lung conditions, somewhere safe to go when temperatures spike. Technological alert tools will help the city respond faster to heat emergencies across its hottest neighbourhoods.
2026 · C40 Cities
Buenos Aires
Buenos Aires advances on electric transport
- Country
- Argentina
- Region
- Latin America
- Climate topics
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- Community
- Electrification
- Transport
How Buenos Aires is doing it
Buenos Aires is advancing its goal to become a carbon-neutral city by 2050 with the launch of the first Trambús line in 2026. This 20 km zero-emission electric corridor will feature 50 fully electric vehicles and dedicated lanes. It is expected to cut travel times by up to 40% for over 50,000 daily users, connecting eight neighbourhoods and integrating efficiently with five subway lines, with stops every 500 metres.
Progress made
In 2026, Buenos Aires moved closer to launching its electric Trambús, with the first route due to start running in November. Concrete paving along the route is now complete and 58 of 60 stops are under construction, bringing better connections to underserved neighbourhoods such as Caballito, Almagro, Boedo and Pompeya.
Residents have helped shape the project from the start. The city carried out more than 3,200 surveys, delivered 240,000 flyers and held three public meetings. Door-to-door outreach continues as works progress, keeping those most affected informed.
2026 · C40 Cities
Cape Town
Cape Town vows to scale up clean energy
- Country
- South Africa
- Region
- Africa
- Climate topics
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- Clean energy
- Electrification
- Energy and buildings
How Cape Town is doing it
In 2026, Cape Town will commission its first city-owned solar plant in Atlantis, generating 14.7 GWh of clean electricity annually, actively delivering on our commitment to energy security, affordability, and carbon neutrality. The city is urgently scaling up this initiative by adding Battery Energy Storage at the site and developing a second solar site of up to 70 MW, which can supply clean energy to nearly 46,000 homes. Guided by our Energy 2050 strategy, these projects demonstrate the City’s leadership in municipal energy generation in South Africa.
2027 · GCoM
Caxias do Sul
Caxias do Sul is making public transport more accessible
- Country
- Brazil
- Region
- Latin America
- Climate topic
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- Transport
In 2027, Caxias do Sul will reorganise and modernise its public transport system, creating up to three new integration stations and preparing the network for the start of fleet electrification.
The changes will make public transport a more attractive alternative to private cars, while improving access to jobs, education, healthcare and other services, particularly for people in more vulnerable areas.
2027 · GCoM
Chefchaouen
Chefchaouen is turning to solar
- Country
- Morocco
- Region
- Africa
- Climate topics
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- Clean energy
- Fossil fuels
- Reducing emissions
In 2027, the Municipality of Chefchaouen will install and commission solar panels across key municipal buildings, including the main headquarters, central market, and bus station. This will significantly reduce reliance on fossil fuels, cut greenhouse gas emissions, and boost local energy independence, demonstrating a concrete step in the city’s commitment to sustainable urban development.
What's happening in 2027
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Clean energy
Install solar panels
The Municipality will install and commission solar panels across key municipal buildings.
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Fossil fuels
Promote energy independence
Solar panels will significantly reduce reliance on fossil fuels and boost local energy independence.
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Reducing emissions
Cut greenhouse gas emissions
2027 · C40 Cities
Chefchaouen
Chefchaouen is turning to solar
- Country
- Morocco
- Region
- Latin America
- Climate topics
-
- Clean energy
- Reducing emissions
In 2027, the Municipality of Chefchaouen will install and commission solar panels across key municipal buildings, including the main headquarters, central market, and bus station.
This will significantly reduce reliance on fossil fuels, cut greenhouse gas emissions, and boost local energy independence, demonstrating a concrete step in the city’s commitment to sustainable urban development.
2027 · C40 Cities
Chennai
Chennai is turning its parks into flood defences
- Country
- India
- Region
- South and West Asia
- Climate topics
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- Adaptation and resilience
- Urban nature
- Water
In 2027, Chennai is developing 25 new “sponge parks” to soak up stormwater during heavy rainfall, building on 88 already in place across the city.
Alongside this, the city is restoring its waterways (including three lakes) to create greener, safer spaces as protection from increasing flood risks.
2027 · C40 Cities
Chicago
Chicago is putting residents first as data centres grow
- Country
- USA
- Region
- North America
- Climate topic
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- Governance
In 2027, Chicago will regulate data centres by introducing a long-term regulatory framework.
It builds on the city’s Sustainable Data Centres Working Group and a recent Executive Order that aims to protect residents from unfair environmental, energy and infrastructure burdens, while keeping the city open to responsible investment.
2027 · C40 Cities
Copenhagen
Copenhagen is strengthening climate budgeting and governance
- Country
- Denmark
- Region
- Europe
- Climate topic
-
- Governance
In Copenhagen, climate action is embedded across the city, from governance and operations to finance and development.
In 2027, the city will expand its climate budget to cover all of its climate goals across departments. The city will also continue rolling out a new governance model that gives each political committee its own CO2 target for cutting emissions from municipal procurement. Together, these steps will put climate at the heart of financial decision-making.
2026 · C40 Cities
Copenhagen
Copenhagen works to cut carbon emissions
- Country
- Denmark
- Region
- Europe
- Climate topics
-
- Clean energy
- Energy and buildings
- Reducing emissions
In Copenhagen, the city takes climate responsibility for our built environment. From 2026 onwards, it will have decided that all new municipal building projects shall meet the voluntary ‘Low Emission Class’ in the Danish Building Regulations, which will cut construction emissions from each new municipal building project by around 20 percent compared to the mandatory ‘Standard Class’.
2027 · C40 Cities
Curitiba
Curitiba is leading the region's El Niño response
- Country
- Brazil
- Region
- Latin America
- Climate topics
-
- Adaptation and resilience
- Early warning systems
In 2027, Curitiba will keep building on the metropolitan taskforce of 20 cities that it’s already brought together to tackle flooding driven by El Niño.
The city is combining sponge parks, retention basins and satellite monitoring, alongside new contingency plans built specifically for the phenomenon. As C40’s Vice-Chair for El Niño Response, Mayor Eduardo Pimentel is raising awareness of how the climate breakdown is making extreme weather like this more frequent and intense in Latin America, and how cooperation between cities can help protect their residents.
2026 · C40 Cities
Curitiba
Curitiba accelerates electrification of transport
- Country
- Brazil
- Region
- Latin America
- Climate topics
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- Electrification
- Reducing emissions
- Transport
In 2026, Curitiba is accelerating the electrification of its transport system.
In May, the city introduced the first public electric vehicle charging station in southern Brazil. It will serve cars, taxis, ride shares and commercial trucks on a former gas station site. Developed in partnership with C40’s Laneshift programme, the station is a major step in Curitiba’s mission to electrify transport and achieve carbon neutrality by 2050.
2027 · C40 Cities
Dalian
- Country
- China
- Region
- Central East Asia
- Climate topic
-
- Transport
In 2027, Dalian will replace around 350 outdated buses, cutting transport emissions, boosting air quality and improving quality of life.
The move is part of a wider push to build urban resilience and green development across the city.
2026 · C40 Cities
Dalian
Dalian pledges climate resilience and adaptation
- Country
- China
- Region
- Central East Asia
- Climate topics
-
- Adaptation and resilience
- Community
- Transport
In 2026, Dalian is launching its core climate resilience plan, “the Dalian Climate Change Adaptation Work Plan”. Within this, the city is conducting a detailed, scientific risk analysis to protect services and guide future urban development. Also, as part of our work, we will replace 1,096 outdated buses with new electric models in 2026, which will improve air quality, urban resilience, green development, and residents’ overall livelihoods.
Progress made
In 2026, Dalian welcomed 500 electric buses, the first batch in a large-scale overhaul of its ageing fleet. The city has also drafted its Climate Change Adaptation Work Plan, mapping climate risks and setting out new ways to adapt across key sectors.
2027 · C40 Cities
Dar al Salaam
Dar es Salaam is improving waste management and clean cooking
- Country
- Tanzania
- Region
- Africa
- Climate topics
-
- Clean energy
- Waste management
How Dar al Salaam is doing it
In 2027, Dar es Salaam will register at least 500 informal waste workers, giving them a path to better protections and skills development, and open two Material Recovery Facilities to upgrade its waste system.
To build towards its target of 80% of residents using clean energy for cooking, the city will deliver cleaner cooking solutions to schools, markets and other institutions serving more than 100 people.
2027 · C40 Cities
Dubai
Dubai is expanding its community parks to connect residents
- Country
- United Arab Emirates
- Climate topic
-
- Urban nature
In 2027, Dubai is building 6 new parks to give residents shared spaces close to home, improving quality of life and bringing neighbours together.
Backed by Dubai Future Foundation and private-sector partners, the programme is scaling up after a successful pilot phase.
2027 · GCoM
Florianópolis
Florianópolis is scaling up organic waste collection
- Country
- Brazil
- Region
- Latin America
- Climate topic
-
- Waste management
In 2027, Florianópolis will expand organic waste collection by 20%, reaching at least 50% of municipal schools, and extend collection to seven communities in Maciço do Morro da Cruz.
The city will also launch a new programme to support local composting, increasing organic waste treatment and reducing the amount sent to landfill.
2027 · C40 Cities
Fortaleza
Fortaleza is building an early warning system for extreme weather
- Country
- Brazil
- Region
- Latin America
- Climate topic
-
- Early warning systems
In 2027, Fortaleza will have 20 weather stations feeding real-time data into an early warning system, helping Civil Defense reach people faster when extreme weather hits, including as a consequence of phenomena like Super El Niño.
The network will prioritise the areas most at risk, keeping the city’s most vulnerable residents well-prepared.
2026 · C40 Cities
Fortaleza
Fortaleza acts to reduce emissions
- Country
- Brazil
- Region
- Latin America
- Climate topics
-
- Community
- Reducing emissions
- Waste management
In 2026, Fortaleza will continue advancing toward the goal of reducing methane emissions from waste by up to 30% by 2030.
To achieve this, the city will implement biodigesters and composting systems for organic waste generated in street markets and public markets, as well as install and operate biodigesters in 164 municipal schools, strengthening Fortaleza’s sustainable waste management
Progress made
In 2026, Fortaleza installed biodigesters in 164 schools, turning food waste into a resource rather than landfill. The city is also beginning feasibility work on composting systems for organic waste from street and public markets. This is part of a broader push to cut methane emissions from waste by up to 30% by 2030.
2027 · C40 Cities
Freetown
- Country
- Sierra Leone
- Region
- Africa
- Climate topics
-
- Clean energy
- Urban nature
- Water
How Freetown is doing it
Freetown is protecting its coastline and water systems.
In 2027, to ensure a water-safe city, Freetown will plant 200,000 additional mangroves across vulnerable coastal areas, building on the 1.2 million trees already planted out of its 5 million target. The city will also construct 24 new solar-powered water kiosks, expanding on the 65 already completed, bringing clean, safe and reliable water to over 7,000 underserved residents.
Freetown is expanding access to waste collection
In 2027, Freetown will bring private waste collection to 15% more residents, building on the 27,000 households (a quarter of the city population) already connected since the 2026 launch of the #DirtMusGo campaign. The push keeps the city on track for 60% citywide coverage by 2028, cutting illegal dumping, improving sanitation, and drawing more private investment into recycling.
2026 · C40 Cities
Freetown
Freetown combats heat and waste
- Country
- Sierra Leone
- Region
- Africa
- Climate topics
-
- Adaptation and resilience
- Extreme heat
- Waste management
How Freetown is doing it
In 2026, Freetown will continue to focus on tackling heat and waste.
The city will intensify its efforts to protect the 35% of the population living in the city’s 82 informal settlements. This includes installing improved cold storage facilities in five markets, adding shade canopies and expanding cool roofing, all aimed at protecting our most vulnerable residents. At the same time, Freetown is addressing waste, the city’s second-largest source of emissions. In 2026, the city commits to reducing organic waste emissions by 25% by transforming waste into clean energy and expanding composting initiatives, paving the way toward a 40% reduction by 2028. In doing so, Freetown will advance the circular economy and create good green jobs within low-income communities.
2026 · C40 Cities
Guadalajara
Guadalajara expands its green spaces
- Country
- Mexico
- Region
- Latin America
- Climate topics
-
- Energy and buildings
- Extreme heat
- Urban nature
How Guadalajara is doing it
In 2026, Guadalajara will significantly boost public health and green space. The city is strengthening the Low-Emission Zone “Zona AIRE,” with new air quality monitoring and expanding pedestrian areas by 2,000m². Additionally, key public spaces like Plaza de la Liberación, Fundadores, Cabañas, and Paseo Degollado will undergo greening. Under the Carbon-Neutral Public Buildings Roadmap by 2050, the city will plant 20,000 new trees to combat urban heat islands, and by the end of 2026, we will upgrade three public buildings with energy-efficiency and renewable-energy measures.
2027 · C40 Cities
Heidelberg
Heidelberg is decarbonising heating
- Country
- Germany
- Region
- Europe
- Climate topics
-
- Clean energy
- Energy and buildings
- Fossil fuels
In 2027, Heidelberg will start building a river heat pump on the Neckar.
It’s part of the city’s wider plan to fully decarbonise heat supply by 2035. While the city’s heat is already 50% renewable, it’s scaling up with two 30MW heat pumps, one drawing from the river and one from wastewater, and giving residents a stake in the project through the Heidelberg KLIMA-INVEST scheme.
2027 · GCoM
Hobart
Hobart is pioneering a partnership for bushfire resilience
- Country
- Australia
- Region
- East, Southeast Asia and Oceania
- Climate topics
-
- Adaptation and resilience
- Extreme heat
- Just transition
In 2027, the City of Hobart together with Kingborough Council, a local insurer, and the University of Tasmania, will deliver an Australian first bushfire resilience pilot, helping households in high-risk urban bushland communities understand and reduce their bushfire risk. Combining practical property assessments, risk mapping, targeted hazard reduction and independent research, the partnership creates a scalable model for community resilience that could also improve access to affordable insurance.
What's happening in 2027
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Extreme heat
Bushfire resilience pilot
The pilot helps households in high-risk urban bushland communities understand and reduce their bushfire risk.
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Adaptation and resilience
Community resilience
The partnership creates a scalable model for community resilience.
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Just transition
Affordable insurance
The pilot could improve access to affordable insurance.
2027 · GCoM
Hobart
- Country
- Australia
- Region
- East, Southeast Asia and Oceania
- Climate topic
-
- Extreme heat
In 2027, the City of Hobart together with Kingborough Council, a local insurer, and the University of Tasmania will deliver an Australian-first bushfire resilience pilot, helping households in high-risk urban bushland communities understand and reduce their bushfire risk.
Combining practical property assessments, risk mapping, targeted hazard reduction and independent research, the partnership creates a scalable model for community resilience that could also improve access to affordable insurance.
2027 · C40 Cities
Hong Kong
Hong Kong, China is expanding electric vehicle charging infrastructure
- Country
- China
- Region
- Central East Asia
- Climate topics
-
- Clean energy
- Fossil fuels
- Transport
In 2027, Hong Kong will expand its EV charging infrastructure to around 200,000 parking spaces, including and around 20,000 public chargers, all together supporting more than 300,000 electric vehicles.
2027 · C40 Cities
Istanbul
Istanbul is bringing bike sharing to every district
- Country
- Türkiye
- Region
- Europe
- Climate topics
-
- Fossil fuels
- Transport
In 2027, Istanbul will expand its bike-sharing system, launched in 2026 with 2,400 e-bikes across 17 districts, to every district of the city, adding more electric bicycles and giving residents an easy, low-carbon way to make short trips and connect to public transport.
2027 · C40 Cities
Karachi
Karachi is investing in solar power
- Country
- Pakistan
- Region
- South and West Asia
In 2027, Karachi is investing in solar power for its street lights and parks. Alongside this, the city is investing in new urban parks and forests as part of wider efforts to green the city.
2027 · C40 Cities
London
- Country
- United Kingdom
- Region
- Europe
- Climate topics
-
- Clean energy
- Extreme heat
- Public health
London is building a climate resilient future
In 2027, London will bring together partners from different sectors to coordinate and drive action on Heat Ready London, the capital’s first heat plan, focusing on reducing overheating in homes, schools, hospitals, care settings and public spaces. The city will also expand greening and shade, and build the funding model needed to scale heat-resilient housing for the most vulnerable communities.
London is driving investment in net zero
In 2027, London will continue to support public sector organisations through the Green Finance Fund, with more than GBP 346 million already committed to 15 projects delivering energy efficiency upgrades, zero-emission transport, and renewable energy. The fund is expected to cut emissions by nearly 39,000 tonnes of CO₂ annually, equivalent to taking almost 24,000 cars off city roads, while lowering energy costs and supporting green jobs.
2027 · C40 Cities · GCoM
Melbourne
- Country
- Australia
- Region
- East, Southeast Asia and Oceania
- Climate topics
-
- Adaptation and resilience
- Energy and buildings
- Extreme heat
Melbourne is future-proofing its infrastructure
In 2027, Melbourne will reduce the risk of extreme heat and flooding by embedding mandatory climate-resilient design for all new and upgraded municipal infrastructure. These new standards prioritise climate justice by improving heating, cooling and flood resilience for public services and the people who rely on them most.
Melbourne is modernising commercial buildings
In 2027, Melbourne will help owners of privately owned commercial buildings cut emissions through the Retrofit Melbourne Financial Incentive Scheme. The three-year pilot will facilitate energy assessments, planning, and building upgrades. It’s expected to cut over 4,400 tonnes of emissions over 10 years and move the city closer to zero-carbon. In its first year, the scheme will target approximately 400 eligible buildings.
2027 · C40 Cities
Milan
Milan is building heat and flood defences
- Country
- Italy
- Region
- Europe
- Climate topics
-
- Extreme heat
- Urban nature
- Water
In 2027, Milan is expanding its sponge city programme, having depaved over 50,000 sqm and completed more than 70 projects between 2022 and 2025.
The city will invest over €10 million in about 10 new major interventions to replace asphalt with permeable surfaces and green spaces.
Guided by heat and social vulnerability data, the work will prioritise schools, health centres and social care facilities, cutting flood risk and urban heat for those most impacted, and boosting biodiversity.
2027 · GCoM
Montes Claros
Montes Claros is going electric
- Country
- Brazil
- Region
- Latin America
- Climate topics
-
- Air quality
- Transport
In 2027, Montes Claros will make progress on fully electrifying its public transport, continuing the replacement of 100 diesel buses with electric vehicles and installing the charging infrastructure needed for their operation. The shift will reduce greenhouse gas emissions, air pollution and noise, while making public transport more comfortable, safe and reliable.
2027 · C40 Cities
Mumbai
Mumbai is upgrading public buildings
- Country
- India
- Region
- South and West Asia
- Climate topics
-
- Clean energy
- Energy and buildings
- Extreme heat
In 2027, Mumbai will make public buildings more heat-resilient, starting with reflective roof coatings on 65 school buildings to cut heat absorption and improve student comfort.
The city will also install 700kW of solar panels at Fire Brigade offices and the city’s Printing Press, cutting emissions and grid electricity use.
2027 · C40 Cities
Nanjing
Nanjing is accelerating its transition to a low-carbon city
- Country
- China
- Region
- Central East Asia
- Climate topics
-
- Adaptation and resilience
- Clean energy
- Fossil fuels
In 2027, Nanjing will implement its ‘Green, Low-Carbon and Energy’ Five-Year Plan, driving a city-wide shift toward greener production and lifestyles, reducing major pollutant emissions and working toward its carbon peak target on schedule.
2027 · C40 Cities
Oslo
Oslo is scaling up solar power
- Country
- Norway
- Region
- Europe
In 2027, Oslo will scale up solar power with a new target to increase solar capacity tenfold by 2040. To support electrification, Oslo will combine energy efficiency measures, smarter energy use, and more renewables. Solar power works even in a northern city, and by using existing grey surfaces, Oslo can generate clean energy without adding pressure on nature and biodiversity.
2026 · C40 Cities · GCoM
Paris
Paris is turning climate ambition into action
- Country
- France
- Region
- Europe
- Climate topic
-
- Energy and buildings
In 2026, Paris will retrofit 5,000 more social homes as part of an ongoing effort to cut energy consumption in social housing by 35% by 2030 and 50% by 2050.
Meanwhile, 29,000 co-owned properties will also undergo environmental renovation projects, cutting bills for residents and emissions for the city. 2026 will also see a new green space developed at Place du Colonel Fabien, transforming one of the city’s most congested areas into a cool oasis of tranquillity. For the areas in which it is not possible to plant trees, new cooling pagodas will be installed around the city.
Progress since 2025
In 2026, Paris transformed Colonel-Fabien Square, remodelling a roundabout into a public square and urban forest, depaving 4,800m² and planting 74 trees, part of a city-wide greening effort that has seen Paris create dozens of new parks and plant tens of thousands of trees since 2020. The city also added 412 metres of cycling lanes and 980m² of pedestrian space this year. In parallel, Paris renovated 5,000 social homes in 2026, with 30,000 private homes now supported by the EcoRénovons Paris+ renovation scheme.
2027 · C40 Cities
Paris
Paris is preparing public buildings for extreme heat
- Country
- France
- Region
- Europe
- Climate topics
-
- Early warning systems
- Energy and buildings
- Extreme heat
In 2027, Paris will strengthen its public plan against extreme heat, renovating schools, nurseries and municipal buildings, applying lessons learned from 2026’s summer heatwaves.
The plan combines practical fixes such as ceiling fans, blinds, and 100 new shading structures in public spaces, with a growing network of emergency cool havens and a commitment to provide a cooled room in every school, nursery and middle school in the city by the end of the year.
2026 · C40 Cities
Phoenix
Phoenix takes action to tackle extreme heat
- Country
- USA
- Region
- North America
- Climate topic
-
- Extreme heat
Protecting residents from extreme heat through short- and long-term strategies is a top priority for Phoenix.
In 2026, Phoenix will continue expanding resources to provide immediate relief during periods of extreme heat, including offering evening and overnight respite for an estimated 5,000 residents, heat relief training to city employees, and innovative cooling techniques used by paramedics responding to heat emergencies. This year will mark the second of the city’s five-year plan, Shade Phoenix, to add natural and built shade in the areas that need it most. Phoenix will also continue to pilot cool surface technologies to protect residents and infrastructure.
2027 · GCoM
Porto Alegre
Porto Alegre is improving waste management
- Country
- Brazil
- Region
- Latin America
- Climate topic
-
- Waste management
In 2027, Porto Alegre will expand decentralised organic waste management in schools, adding at least five new composting units and gradually scaling up the use of biodigesters. The initiative will reduce waste sent to landfills and cut emissions, while producing biogas and fertiliser for use in schools in a replicable, educational model.
2027 · C40 Cities
Qingdao
Qingdao is restoring its waterways
- Country
- China
- Region
- Central East Asia
- Climate topics
-
- Urban nature
- Water
In 2027, Qingdao will accelerate the restoration of its rivers, lakes, and bays, focusing on 66 key water monitoring sites.
The city will also strengthen ecological protection in Jiaozhou Bay and complete new coastal restoration projects along Laoshan Bay and its east and west coastlines.
2027 · GCoM
Renca
Renca is improving water circulation
- Country
- Chile
- Region
- Latin America
- Climate topics
-
- Adaptation and resilience
- Extreme heat
- Water
How Renca is doing it
In 2027, Renca will introduce a circular economy solution to tackle Chile’s water crisis by using treated industrial wastewater in Cerros de Renca Metropolitan Park. This system will sustainably irrigate over 80,000 trees and prevent forest fires without using any drinking water, democratising access to nature for nearly 2 million people.
What's happening in 2027
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Water
Circular economy solution
Using treated industrial wastewater in Cerros de Renca Metropolitan Park.
-
Urban nature
Sustainable irrigation
This system will sustainably irrigate over 80,000 trees
-
Extreme heat
Prevent forest fires
Fires will be prevented without using any drinking water.
2027 · GCoM
Rio Branco
Rio Branco is scaling up organic waste recycling
- Country
- Brazil
- Region
- Latin America
- Climate topic
-
- Waste management
In 2027, Rio Branco will expand its Municipal Programme for the Reduction and Recycling of Wet Waste by modernising and increasing the capacity of its existing composting system. By diverting 15% of citywide organic waste from landfill to composting, the initiative will cut pollution and emissions, extend landfill lifespan, create green jobs, and transform illegal dumping sites into productive spaces.
2026 · C40 Cities
Rio de Janeiro
Rio de Janeiro expands city climate action
- Country
- Brazil
- Region
- Latin America
- Climate topics
-
- Air quality
- Clean energy
- Early warning systems
In 2026, Rio will transform part of its downtown area into the city’s first Low-Emission District (LED).
This project will add walking and cycling paths, improve public transport, and create green spaces to clean up the air, all while remaining a bustling hub for business and culture. Rio is also preparing for a more resilient future. Next year, we will start a new flood warning system that uses real-time data to protect its most at-risk communities. The Solário Carioca project, which began in 2025, will continue to expand its solar power system, providing cheaper and cleaner energy to municipal buildings.
2027 · C40 Cities
Rio de Janeiro
Rio is reducing climate risk
- Country
- Brazil
- Region
- Latin America
In 2027, Rio will publish its Climate Budget, aligning public spending with emissions reduction targets, climate risk management and the protection of vulnerable residents.
The city will advance its climate agenda by revitalising Avenida Chile, located within the city’s Low Emission District. Rio will also expand its electric bus fleet, with 175 new vehicles expected to begin operating in the second half of 2027, as part of its goal to have at least 20% of municipal buses running on electricity by 2030.
2027 · C40 Cities
Rome
Rome is expanding cool spaces
- Country
- Italy
- Region
- Europe
- Climate topics
-
- Extreme heat
- Urban nature
How Rome is doing it
In 2027, Rome will expand its network of free-access climate shelters as part of the city’s new Heat Plan, building on 178 facilities already mapped in 2026, alongside over 400 green spaces and 3,000 drinking fountains.
The city wants to ensure that every resident is within a 15-minute walk of somewhere cool, prioritising its most vulnerable neighbourhoods.
2027 · C40 Cities
Salvador
Salvador is going electric and building with nature
- Country
- Brazil
- Region
- Latin America
- Climate topics
-
- Early warning systems
- Transport
- Urban nature
How Salvador is doing it
In 2027, Salvador will put 100 new electric buses on the city’s roads and advance an urban renewal project using nature-based solutions across 2,752 km², reaching more than 22,000 residents.
2027 · C40 Cities
Santiago de Chile
Santiago is turning public hospitals into green sanctuaries for climate resilience
- Country
- Chile
- Climate topic
-
- Extreme heat
In 2027, Santiago will roll out 17 “healing gardens” across public hospitals.
Connecting public health, green infrastructure, and adaptation, these nature-based spaces are designed to ease the impacts of extreme heat on hospitals, boosting resilience and offering a model for other cities to replicate.
2027 · C40 Cities
São Paulo
São Paulo is expanding its electric bus fleet
- Country
- Brazil
- Region
- Latin America
- Climate topic
-
- Transport
How São Paulo is doing it
In 2027, São Paulo will continue electrifying Brazil’s largest bus fleet, adding at least 517 new electric buses.
The city’s more than 2,000 electric buses are already saving around 70 million litres of diesel and avoiding the emission of 174,000 tonnes of CO₂ every year. The expansion means cleaner air and real health benefits for the city’s most vulnerable residents.
2027 · C40 Cities
Seoul
Seoul is building heat and flood protections
- Country
- South Korea
- Region
- East, Southeast Asia and Oceania
- Climate topics
-
- Early warning systems
- Extreme heat
In 2027, Seoul will protect residents from extreme weather by continuing the rollout of its AI-powered flood early warning system, and advancing major drainage infrastructure in three high-risk areas: Gangnam Station, Gwanghwamun and Dorimcheon Stream.
The city also provides approximately 4,000 cooling shelters, helping keep vulnerable residents safe as temperatures rise.
2027 · C40 Cities
Shenzhen
Shenzhen is tackling the most carbon polluting vehicles
- Country
- China
- Region
- Central East Asia
- Climate topics
-
- Reducing emissions
- Transport
In 2027, Shenzhen will shift its carbon emissions focus to heavy-duty trucks, terminal tractors and other big polluters.
The city is aiming to raise the share of new energy heavy-duty trucks from 5% to 9%, while exploring the creation of zero-carbon transport corridors.
2027 · C40 Cities
Sydney
Sydney is tackling heat and upgrading its buildings
- Country
- Australia
- Region
- East, Southeast Asia and Oceania
- Climate topics
-
- Energy and buildings
- Extreme heat
- Fossil fuels
In 2027, Sydney will address urban heat, prioritising vulnerable communities.
Alongside this, the city will drive the shift to fully electric buildings, cutting emissions to create healthier, more energy-efficient homes and workspaces for residents and businesses.
2027 · C40 Cities
Tel Aviv
Tel Aviv-Yafo is embedding climate into urban planning
- Country
- Israel
- Region
- Europe
- Climate topic
-
- Transport
In 2027, Tel Aviv-Yafo will integrate climate-oriented planning across major transport and public space projects.
The city will advance walking, cycling and public transport along light rail and future metro corridors, while designing public spaces as climate refuges, combining mature trees, shade, stormwater management and accessible, comfortable conditions for pedestrians.
2027 · GCoM
Teofipol
Teofipol is strengthening energy security
- Country
- Ukraine
- Region
- Europe
- Climate topics
-
- Just transition
- Urban nature
In 2027, the Teofipol Community will expand its miscanthus plantations to 24 hectares on degraded land, helping restore the soil while producing a local renewable fuel for heating.
Following the launch of its new pellet plant, the community will pilot the use of miscanthus as a fuel source in 2027, lowering heating costs and reducing dependence on fossil fuels while strengthening energy security.
2027 · C40 Cities
Tokyo
Tokyo is accelerating clean energy and resilience
- Country
- Japan
- Region
- East, Southeast Asia and Oceania
- Climate topics
-
- Clean energy
- Energy and buildings
- Extreme heat
In 2027, Tokyo will go even further in expanding renewable energy and strengthening resilience.
Thanks to successful programs popularising solar panels and batteries, the city is on track to achieve its 2030 targets two years ahead of schedule and raising its 2035 goals to 4 million kW of solar and 4.5 million kWh of storage. To counter extreme heat and global energy insecurity, Tokyo will also improve insulation and fit more solar panels and batteries at metropolitan facilities used as evacuation centres and temporary shelters, pairing decarbonisation with energy security on the path to Zero Emission Tokyo.
2027 · C40 Cities
Warsaw
Warsaw is retrofitting its schools and setting a new green standard for building renovatio
- Country
- Poland
- Region
- Europe
- Climate topic
-
- Energy and buildings
In 2027, Warsaw will scale up major energy and climate upgrades across more than 20 schools.
This builds on €50 million already invested in 26 schools through the EU Recovery Fund. The city will also introduce a new green standard for building renovation, so energy savings go hand in hand with urban greening, rainwater retention and circular economy principles, whilst providing climate resilience and ecological education for students, school communities and investors alike.
2027 · C40 Cities
Wuhan
Wuhan is redesigning its streets for the heat
- Country
- China
- Region
- Central East Asia
- Climate topics
-
- Extreme heat
- Urban nature
In 2027, Wuhan will keep developing its Urban Cooling Action Plan, part of a broader push through 2026-2030.
The city is expanding green spaces, building sun and rain canopies at busy intersections, and rolling out mist cooling systems across neighbourhoods alongside green roofs, rain gardens and permeable pavement.
2026 · C40 Cities
Wuhan
Wuhan sets new goals for a greener future
- Country
- China
- Region
- Central East Asia
- Climate topics
-
- Community
- Urban nature
- Waste management
How Wuhan is doing it
In 2026, Wuhan will continue to improve the urban environment by protecting and restoring Xibeihu Lake.
This project will see volunteers and residents work together to document biodiversity, remove invasive species, and keep the lake clean. This will improve the local ecosystem, act as a natural filter, and provide health and recreational benefits for the community. Beihu Community will strengthen pollution control by optimising public service facilities and improving the rain and sewage system around the lake. Meanwhile, a new garden initiative will transform unused spaces like rooftops into biodiversity hotspots, using sustainable practices like composting kitchen waste to thrive.
Progress update
In 2026, Wuhan restored water quality and shoreline at Northwest Lake, drawing over 50 bird species back to the area, including rare egrets and herons. The city renovated 2.3km of shoreline, creating a Cherry Blossom Avenue and five waterfront platforms.
Alongside this, the Beihu Community built 17 shared community gardens where residents adopted 91 “travelling plant pots”. Wuhan also established its first grassroots ecological team, running over 300+ voluneer green activities this year.
What's happening in 2026
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Urban nature
Water quality
Restored water quality and shoreline at Northwest Lake, creating a Cherry Blossom Avenue and five waterfront platforms
-
Community
Grassroots activities
Wuhan established its first grassroots ecological team, running over 300+ volunteer activities
-
Community
Traveling plant pots
Beihu Community built 17 shared community gardens where residents adopted 91 “travelling plant pots”
Cities can’t do it alone
Cities are living examples of what climate resilience looks like in practice, demonstrating to others what is possible, and they’re ready to do more.
But to go further and faster, they need national governments and partners to match their ambition with finance, supportive policies, and technical assistance to implement solutions faster.
Climate action works best when every level of government works together.
related
Commitments by C40 cities to drive ambitious climate results and halve fossil fuel use by 2030.
Supporting cities to create ambitious climate strategies that deliver meaningful community benefits.
C40 mayors and global partners are leading urban climate adaptation and resilience efforts on the front lines.
