From fire hydrants to rooftops, cities around the world have developed very different methods for staying cool in a heatwave.

From fire hydrants to rooftops, cities around the world have developed very different methods for staying cool in a heatwave.

Londoners sought relief from scorching conditions on Monday as the U.K. capital experienced its hottest May day on record, with temperatures exceeding 34 C in parts of the city.

New research confirms that extreme heat is reshaping city life, and we’re not prepared for what that means for the future