Extreme heat warnings and heat advisories were issued across parts of the U.S. Southwest and Pacific Northwest on Friday.

Gov. Gavin Newsom on Thursday announced the launch of a new, first-in-the-nation tool to forecast and rank heat severity in ...

Heat advisories have been issued for large areas of California, as forecasters expect temperatures to climb above 100 across the state this weekend.

A University of Maryland study reveals more frequent and intense marine heat waves in Chesapeake Bay using advanced satellite ...

A short-lived but punishing blast of intense heat will spread over the western United States through Saturday, pushing ...

Walking during the middle of the day, however, can be less than utterly hellish if one sticks to the shady side of the street ...

Last year’s extreme heat caused some time honored local traditions to adjust their hours or relocate to indoor venues to keep ...

Wilderness expert Jon Mincks says the summer heat enhances the risks of hiking in the desert and offers some advice to stay out of danger.

As Arizona braces for another round of triple-digit temperatures starting Wednesday, local and state leaders are stepping up ...

Could Mississippi get derechos this summer? AccuWeather forecast says Gulf could get hot weather and severe storms. What to ...

WHAT/WHEN: The early-season heatwave that has been baking southern Idaho this week will reach its peak on Saturday, May 31, when temperatures are expected to soar into record-challenging territory ...

A sign outside of the Labrador City Fire Department indicates there is an extreme risk of fires as of Wednesday. (Darryl Dinn ...