Extreme heat is having its moment in the sun. This year's headlines have been as relentless as the temperatures: "Spain endures record heatwave," "Devastating heatwave in South Asia," "Texas shatters heat record," "Can you even call deadly heat 'extreme' anymore?"
This worldwide coverage has called attention to a massive challenge that will only grow in scope and seriousness. Nowhere are cooling measures more urgent than in our cities, where streets, buildings, industries, and vehicles could increase temperatures by a catastrophic 4° Celsius by the end of the century, putting the world's poorest people at highest risk.
