Cities are leading where it matters most
With more mayors, governors, and global leaders coming together than ever before, this year’s London Climate Action Week will be the biggest yet and marks a pivotal moment for city-led climate action.
At a time when cities are on the frontline of the climate crisis, C40 mayors are delivering what residents need right now: healthier, safer and more affordable cities.
This year, we spotlight how cities are managing extreme heat and water resilience, driving the transition from fossil fuels, shaping the future of urban data centres, and, now in its second year, delivering on the Yearly Offer of Action.
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EVENTS
Main stage plenary
Guildhall
22 June 2025 | 08:00 – 18:00
C40 and Bloomberg Philanthropies
Guildhall
23 June 2025 | 13:45 – 15:45
C40
Guildhall
23 June 2025 | 15:30 – 17:00
C40
Guildhall
23 June 2025 | 15:30 – 17:00
C40
Barbican
24 June 2026 | 10:00 – 12:00
C40, City of London Corporation, sponsored by Bloomberg Philanthropies
Mansion House
24 June 2026 | 14:00-14:25 (BST)
C40 and GCoM
Google London Central Saint Giles
24 June 2025 | 14:00 – 16:00
C40 and Breathe Cities
Central London
24 June 2025 | 14:45 – 15:45
C40 and Community Jameel and Gensler
Gensler office
24 June 2025 | 16:15 – 18:15
C40 and LSE Cities
LSE Sheikh Zayed Theatre
24 June 2025 | 18:30 – 20:00
C40 and Design Museum
London Design Museum
25 June 2025 | 10:00-16:30
C40, Arup, and University of Exeter
Arup Offices
25 June 2025 | 14:00 – 15:30
Contact us
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