Dangerous heat wave threatens oppressive temperatures in much of the US
A police officer holds ice to their neck to try and stay cool following the 2026 Nathan's Famous Fourth of July hot dog eating contest at Coney Island in the Brooklyn borough of New York, July 4, 2026. (AP Photo/Anna Connors, File)
A widespread and dangerous heat wave was building across the U.S. on Saturday, with triple-digit highs expected in the Southwest and Great Plains this weekend before spreading eastward under a dome of high pressure that meteorologists say could trap oppressive temperatures for a week or more.
Forecasters advised people to stay hydrated and find places to cool off, warning of temperatures 15 to 25 degrees Fahrenheit (8 to 14 degrees Celsius) warmer than normal in many areas, including at night — especially bad for people's health because their bodies won't have a chance to recover. The heat dome was expected to affect as much as two-thirds of the continental United States.