alertOn Saturday, around 130 million people were under a heat alert or warning. Since at least one youngster in Arizona has already perished from heat-related causes, over 57 million people are still on heat alerts.
Meteorologists are cautioning that warm evenings will cause heat exhaustion in humans. Death Valley may see temperatures as high as 128F (53C) on Monday.
Scientists claim that despite the difficulty in connecting specific heatwaves to climate change, they are becoming more frequent and powerful as a result.
