Cleaner city design can cool Barcelona by up to 1.75°C, but new white roofs and parks still cannot offset the more than 6°C warming scientists project by 2100, leaving heat risk high in the neighborhoods that need help most

American cities are facing a deadly surge in heat-related deaths, with fatalities more than doubling since 1999. A new study reveals that while white roofs offer daytime cooling, pairing them with urban parks is the most effective strategy for vulnerable neighborhoods. However, even these measures may be outpaced by rising temperatures, highlighting the urgent need for targeted interventions.