A Heat Advisory is in effect for the entire Chicago area as high temps and humidity combine to make a heat index well into the triple digits.

What is "corn sweat," and how does it contribute to rising heat and humidity in Illinois? See what experts say.

The Saline Valley Conservancy District denies any rumors of contamination, saying that the boil order was caused by a ...

Another heat dome is moving over Illinois this week as temperatures near the triple digits. Here's what that means and when ...