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 ...

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 ...

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 ...

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

Central Florida is under a heat advisory on Friday, with temperatures expected to reach a heat index of 104 to 109 degrees.

Humidity doesn’t just make you feel sticky and uncomfortable – it also creates extra dangerous conditions on hot days.

Extreme Heat Warning in Memphis with heat index up to 110°F, affecting surrounding areas until 8 PM CDT Thursday.

A Heat Advisory has once again been placed over the entire Lowcountry and is set to be in effect from 11 a.m. to 8 p.m.

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 ...

Highs will stay below the average both Saturday and Sunday... ranging between 87-92 degrees. Heat index values will stay closer to 100 instead of hovering around 110... thanks to dew points dropping ...

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