Heat is the number one killer -- and it’s heading to the most densely populated part of America for a prolonged period.

It will be the hottest day of the year in most of Massachusetts Thursday and the first time Boston has hit 90 in 2025.

THEY’RE NEAR AND OVER 70 AND THAT’S THE STICKIER AIR THAT’S GOING TO BUILD TONIGHT INTO TOMORROW, REALLY PEAKING ON THURSDAY WITH DEW POINT TEMPERATURES UP AROUND 70 DEGREES. AND THEN THEY BACK OFF ...

Summer in Southern Colorado means heat, and sometimes, dangerous heat. When temperatures climb to a point that could impact ...

Like water ice and mosquitoes, heat advisories are staples of Philadelphia summers. But usually the National Weather Service ...

The National Weather Service office in Las Vegas also issued an “extreme heat warning” for Death Valley National Park, the ...

Basically, when the body sweats, the perspiration evaporates, cooling the body. When the humidity is high, the sweat doesn't ...

Extreme heat warnings are in effect across Arizona and Nevada, raising concerns for children's health. Heat advisories span ...

A high pressure will settle into southeastern United states this coming weekend with hot and muggy conditions expected. There ...

A relentless and historic heatwave is gripping the American Southwest, forcing authorities in Arizona, Nevada, and California ...