A weeklong heat wave that officials believe has killed at least 25 people continued Sunday, with 40 million people under heat ...

The heat index is forecast to hit a scorching 113 degrees in D.C. on Friday.

Record-setting heat is suspected in 22 deaths from the Deep South to the Midwest to the East Coast, authorities said, with ...

A dangerous heat wave​ arrives in Philadelphia and the surrounding suburbs this week, where each day temps could surpass 100 ...

More than 250 million Americans are experiencing a dangerous heat wave that has already spoiled some Fourth of July plans.

By Ahmed Aboulenein and Nathan Layne WASHINGTON, July 3 (Reuters) - A dangerous heat wave upended Fourth of July celebrations ...

More than 160 million people are under extreme heat warnings or heat advisories ahead of the Fourth of July weekend.

The heat wave threatens to overwhelm U.S. grids and may force some to change their plans on one of the busiest travel weeks ...

Summer has barely started in the Northern Hemisphere, but already it’s offering an oppressive preview of life on a hotter ...

A major heat wave is affecting much of the eastern half of the United States this week, bringing dangerous conditions to ...

A July 4th heat wave smashed records up and down Delaware.

The hottest daytime temperatures of the week are expected on Wednesday and Thursday.