It wasn't just the heat that reached unprecedented levels; the next day, the heat index climbed to 120 degrees.

A relentless heat wave continues to grip Palm Beach County, increasing the demand for indoor recreation centers, particularly ...

Mostly clear, with a low around 74. Calm wind. A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a ...

New England’s heat wave will continue into its third day on Wednesday with scorching hot temperatures in the 90s and stifling humidity that will send heat index values into the 100s. Heat advisories ...

Extreme heat is disrupting air travel across the U.S. this week, as record-setting temperatures impact both flight schedules and aircraft performance.

Extreme heat is likely to break daily temperature records, but the weather forecast calls for a cool-down as August arrives.

July has seen 21 days where the temperature was higher than 90 degrees, but there will be some relief to welcome in August.

Residents in the Southeast U.S. are no strangers to heat in the summertime, but this week's sweltering hot weather set at least one record and has forecasters urging residents to limit time outside on ...

"A lot of it's going to be like drain lines and capacitors," said Conner Beattie, Air Current Inc. "Drain lines clog up ...

Intense heat and humidity will peak on Wednesday, with heat index values reaching up to 105 degrees in the lowlands. Rain and ...

Extreme heat is disrupting air travel across the U.S. this week, as record-setting temperatures impact both flight schedules and aircraft performance.