Michigan's heat wave this week will feel even warmer because of high humidity. Here's how the heat index works.

Temperatures are skyrocketing for the third straight day across the Eastern US, but there’s at least three different ways to ...

The metric of how hot the air actually feels has roots in a 1979 journal paper called “The Assessment of Sultriness.” By Andy Newman In recent days, you may have seen or heard many mentions of a ...

To avoid overheating, some experts say it’s important to pay attention not only to the heat index but to a lesser-known ...

Ever heard of wet-bulb temperature? It’s measures how humid the weather is. FOX Chicago Meteorologist Kaitlin Cody explains ...