The National Weather Service released an updated extreme heat warning at 12:53 p.m. on Friday in effect until 9 p.m. for ...

A public health researcher explains the signs someone is developing heat exhaustion or heat stroke, and what to do.

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.

From Texas to New England, millions of Americans are facing dangerously hot temperatures that have led the National Weather ...

The warning is set from noon Sunday until 8 p.m. Monday. Dangerously hot conditions are expected with heat index values up to ...

A heat advisory will continue Sunday afternoon before late-day thunderstorms cool things down. More heat and storms are ...

The risks of heat are only growing thanks to lasting heat waves, extreme nighttime temperatures and unusual humidity, like ...