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, ...

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

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

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 ...

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

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 ...

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.

A historic, deadly heat wave affected much of the Midwest and specifically Chicago in July of 1995. Over 700 deaths were ...