Extreme heat exposure on the rise for millions of kids: UN

Nearly half a billion children are facing twice as many days of extreme heat each year -- or more -- than their grandparents did, the UN said Tuesday, warning of deadly consequences.

As climate change continues to push up temperatures globally, one in five children -- some 466 million kids -- live in areas that are registering "at least double the number of extremely hot days every year" compared to 60 years ago, the UN children's agency UNICEF said.