The National Weather Service issued an extreme heat warning for New Castle County lasting through June 25. See how hot ...

It is going to be punishingly hot in Columbus over the next few days, with highs in the 90s and heat index values over 100.

Michigan sees temperatures in the 90s, prompting extreme heat warnings and advisories in the Lower Peninsula. What to know.

Energy Star, an Environmental Protection Agency program promoting energy efficiency, recommends setting ACs to 78 degrees for ...

Air conditioning units can be lifesaving during a summer heat wave, but there are other tips to help keep homes cool.

Two days of stifling heat await New Jersey on Monday and Tuesday with temperatures as high as 100 and a real feel that could ...

New York and Washington, D.C., could see temperatures surpass 90 degrees for up to a week. For people with ...

A heat wave will intensify along the East Coast this week as tropical humidity levels and 100-degree temperatures reach big ...

The shade -- under the roof and the upper deck, in every dugout and tunnel -- was a popular place at Wrigley Field on Sunday.

Tens of millions of people across the Midwest and East endured dangerously high temperatures again on Sunday as a rare June ...

A multiday heat wave is bringing high temperatures and health risks from the Midwest to the Northeast, prompting warnings and ...

More than 150 million Americans are under the highest-level extreme heat alerts during a wave of above-average temperatures.