Extreme heat is impacting the Chicago area on Monday afternoon after storms popped up in the morning hours. The National Weather Service issued a Heat Advisory for Boone, Cook, DeKalb, Will, Grundy, ...

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 temperature. Since heat index values were devised for shady, light wind ...

Steady warmth and humidity is once again leading to some spotty fog this morning. However, the heat and humidity will be building to dangerous levels today, prompting a Storm Team 4 Weather Alert Day.

Temperatures start in the mid-to-high 70s Sunday morning, thanks to high humidity levels. A heat advisory is in place through 8 p.m. The rest of the day will bring more of the same: High heat and some ...

Temperature is one of the primary factors in every weather forecast, but when we get into the dog days of summer, it’s just not that simple. We have to use something called the “heat index” to ...

FIRST ALERT WEATHER. SO WE GOT A MIXED BAG OF THINGS COMING. IMPACT ALERT KIND OF ESCALATED QUICKLY. IT DID. YEAH. YOU KNOW SO WE HAVE SOME ALERT DAYS BECAUSE OF THE HEAT. YOU KNOW, JUST TOMORROW’S ...

A heat advisory will in effect for New Castle County on July 28 as temperatures continue to rise through the week, according to the National Weather Service in Mount Holly, New Jersey. The advisory ...