World Mayors Summit Day 2
Cooler cities, transformed food systems, and climate-focused urban planning. At the 2025 World Mayors Summit, C40 Cities announced three new...
Global cities unite to tackle the risks of extreme heat
Rio de Janeiro, Brazil (3 November 2025) – A new global coalition of cities has today pledged urgent action to...
A Hot Topic: Cities tackle rising temperatures
This month, C40 will highlight Cool Cities: the cities working to address our overheated urban spaces. The Cool Cities Network…
Cities are creating a resilient future by adapting to climate change
A joint op-ed by the Mayor of Amman and Secretary General of Dubai's Executive Council 2016 was a momentous year…
Planting Healthy Air: A Natural Solution to Address Pollution and Heat in Cities
Can nature help cities address the twin problems of air that is too dirty or too hot? Based on a…
Photo Blog: C40 cities showcase leadership on climate adaptation at Rotterdam conference
In May, 18 C40 cities from around the world gathered in Rotterdam at the Adaptation Futures Conference, the largest adaptation…