US EditionCities Unite to Tackle Deadly Extreme Heat
The coalition aims to protect over 145 million people by 2030, addressing the deadliest weather hazard causing nearly 500,000 deaths annually, with urban heat exposure expected to quintuple by 2050.
- On November 4, 2025, at the C40 World Mayors Summit in Rio de Janeiro, C40 Cities launched the Cool Cities Accelerator with 33 founding cities representing over 145 million people.
- Rising exposure to life-threatening urban heat has prompted action, as extreme heat causes nearly 500,000 deaths annually and major capitals saw a 54% increase in days above 35°C over twenty years.
- The Accelerator provides a science-based framework for near-term and five-year actions as participating cities establish heat leadership, strengthen early warnings, and ensure cooling access within two years while improving buildings and urban shade within five years.
- Philanthropies committed funding, with The Rockefeller Foundation providing approximately USD 1 million and $50 million mobilized for adaptation and resilience funding.
- Officials emphasized urgency and practical leadership as C40's nearly 100 mayors, representing over 900 million people, frame the effort as a global movement, with Mark Watts stating `Extreme heat is a silent killer and an increasingly urgent global threat`.
36 Articles
36 Articles
Amsterdam, Athens, Barcelona, Boston, Buenos Aires, Chicago, Fortaleza, Guadalajara, London, Melbourne, Milan, Bombaim, New York, Paris, Phoenix, Rio de Janeiro, Rome, Salvador, Santiago and Tokyo form the group of 33 cities. Together, the group represents 145 million people.
The combination against extreme heat is led by the group C40 Large Cities for Climate Leader, which brings together nearly 100 cities committed to combating climate change.
The climate crisis kills one person every minute through extreme heat. This is according to the ninth annual report, ‘The Lancet Countdown on Health and Climate Change’. The document, published in collaboration with the World Health Organization, was published on 29 October and warns that lack of climate action is killing millions of people through extreme heat, air pollution, wildfires and the spread of infectious diseases. The data shows that …
India Joins Global Cool Cities Climate Initiative
National | 4 November 2025 – As Indian cities experience record-breaking temperatures, three major urban centres i.e. Ahmedabad, Bengaluru and Mumbai have joined a global coalition of 33 cities committed to addressing one of the most serious impacts of the climate crisis: extreme heat. Announced on the first day of the C40 World Mayors Summit […] The post 3 Indian Cities Among 33 Worldwide to Reimagine Urban Spaces for a Hotter Future appeared f…
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