Widespread Dangerous Heat Wave Forecast for Much of the US

A significant and hazardous heat wave is intensifying across the United States, with forecasts predicting triple-digit temperatures in the Southwest and Great Plains, then spreading eastward. A high-pressure system is expected to cause temperatures 15 to 25 degrees Fahrenheit above normal for over a week, impacting up to two-thirds of the continental US. Authorities advise staying hydrated and seeking cool environments to mitigate health risks.