1/16TOPSHOT - Signage warns of extreme heat danger at the salt flats of Badwater Basin inside Death Valley National Park on June 17, 2021 in Inyo County, California. - Much of the western United States is braced for record heat waves this week, with approximately 50 million Americans placed on alert on June 15 for "excessive" temperatures, which could approach 120 degrees Fahrenheit (50 degrees Celsius) in some areas. The National Park Service warns of extreme summer heat, urging tourists to carry extra water and "travel prepared to survive" in the hottest, lowest, and driest national park featuring steady drought and extreme climates. (Photo by Patrick T. FALLON / AFP) Forrás: AFP/Patrick T. Fallon