If you are living in one of many areas of the U.S. currently experiencing a heat wave, your outdoor thermometer may say it's ...

You’ve probably heard people say, “It’s not the heat, it’s the humidity.” There’s a lot of truth to that phrase, and it’s ...

The heat index is a measure of how hot it really feels on your body when relative humidity is factored in with the actual air ...

At 12:11 a.m. on Tuesday, the National Weather Service issued an extreme heat warning valid between 11 a.m. and 9 p.m. for ...

Knowing the difference between heat exhaustion and heat stroke could be the key to saving someone’s life. Here’s what you ...

The National Weather Service issued a Heat Advisory for west central Florida due to heat index values up to 109 degrees, ...

Knoxville bracing for high heat index of 101 degrees, limited visibility due to fog, and potential thunderstorms; slight ...

Jacksonville, North, Northeast Florida: Dangerous heat today, with heat index of 108 to 115. Extreme heat warning and heat ...

Jacksonville is under an extreme heat warning until 7 p.m., with temperatures expected to climb into the hundreds and a feels ...

Tampa reached another milestone on Tuesday afternoon, reaching an all-time record heat index of 119° at around 2:30 p.m.

Heat index values will hover around 110 degrees this afternoon, but scattered showers and thunderstorms will be in store ...

An extreme heat warning and a heat advisory were issued by the National Weather Service for portions of Central Florida and ...