Much of the U.S. is under extreme heat warnings or advisories while New York, Philadelphia and Washington could feel like 100 degrees or more.

The National Weather Service issued heat advisories for a large swath of the East Coast through much of the weekend.

The National Weather Service has issued heat advisories for the southeastern United States. The advisories cover areas from ...

Dangerous heat continues across the U.S. as millions see feels-like temperature reaching into the 90s and 100s from the Southeast to the Midwest.