More Than 165 Million Americans Under Heat Alerts as High Temperatures Hit Much of US

The heat is expected to last until the middle of the week, according to forecasters.

Tourists walk along the National Mall near the Lincoln Memorial in Washington as a heat dome sits over the region leading to extremely high temperatures on July 25, 2025. Saul Loeb/AFP via Getty Images

More than 165 million people in the United States were under some form of heat advisory or warning as soaring temperatures are expected for much of the East Coast, South, and Midwest starting Monday and lasting until the middle of this week.

A tracker run by the federal government shows that roughly 168 million people are under heat alerts across the United States as of Monday afternoon.