The combination of hot temperatures and very muggy weather will create dangerous conditions for outdoor activities each afternoon through midweek.

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 ...

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 ...

The top heat index in Washington on a sultry Tuesday appeared to be 103. The heat index, the “feels-like” temperature, ...

An extreme heat warning and an extreme heat watch were issued by the National Weather Service in Jacksonville for July 28 and ...

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 ...

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

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

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

The National Weather Service released an extreme heat warning at 2:32 p.m. on Tuesday in effect until 9 p.m. for Marion, ...