The climate crisis is rapidly accelerating and with it, heatwaves are becoming longer, stronger, more widespread and more frequent. Already, around 559 million children are exposed to high heatwave frequency and around 624 million children are exposed to one of three other high heat measures - high heatwave duration, high heatwave severity or extreme high temperatures. This report provides yet more evidence that children are on the front lines of the climate crisis. https://www.unicef.org/reports/coldest-year-rest-of-their-lives-children-heatwaves