Millions of Americans are under heat alerts Monday as a heat wave brings triple-digit temperatures or heat indices to nearly ...

Triple-digit temperatures continue Thursday, the third and final day of a heat wave.KCAL News issued a Next Weather Alert for the three-day event, in effect for the Southern California valleys, high ...

California extends Thursday's Flex Alert by 2 hours with ... Southern Californians can expect a slight break from the intense temperatures this weekend but an excessive heat wave will remain in ...

More than 185 million people across most of the United States are on alert for widespread, dangerous heat on Monday.

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.

Temperatures up to 110 degrees are possible in Northern California on Friday as a heat wave brings extremely hot weather to some cities.

SAN FRANCISCO -- A statewide Flex Alert is in effect today with extreme heat expected to strain the state's power grid. Utility companies will focus on energy conservation during peak hours from 3 ...

A phenomenon called "corn sweat" could exacerbate the impacts of the extreme heat blanketing a large portion of the U.S., ...

At least two U.S. states are at an elevated risk of wildfires Tuesday amid "critical fire weather conditions." ...

Numerous states could see heat index values higher than those expected in Death Valley on Thursday, according to the NWS.

Heat doesn’t just mean canceled events. It also poses a health risk. If you can’t afford to cool the whole house, make a “cool space” to sleep in.