More than 125 million Americans were under the highest level of extreme heat alerts during a wave of above-average ...

An "extremely dangerous heat wave" is continuing to scorch a huge area of the eastern United States June 23, affecting tens ...

The deadly heat wave across the eastern half of the country has made for some scary situations. Tens of millions in major ...

Tuesday marked the peak of the heat wave, with cities from Boston to Philadelphia experiencing their hottest temperatures in ...

Nearly 160 million people are under heat alerts from eastern Texas to Maine, as temperatures are forecast to be as much as 20 ...

Several cities in the eastern United States have faced record high temperatures due to a climate phenomenon known as the ...

New York’s Central Park tied a record high of 96 degrees for the date Monday, which was set in 1888. In neighboring New ...

More than 37 million Americans are under heat advisories across the U.S., according to the National Weather Service. Here's ...

Tens of millions of Americans sweltered outside or sought air-conditioned refuge as an "extremely dangerous" heat wave ...

Extreme heat is only becoming more common. In the United States, heat waves now occur three times as often as they did in the ...

A dangerous heat wave is currently baking the eastern two-thirds of the United States with extreme temperatures in the mid-to ...

Heat waves are primarily caused by high-pressure systems that push warm air down onto an area and hold it there. During heat ...