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

What is heat index and how does it affect how stifling excessive heat feels?

Exercising outside in high temps can be a health hazard. Here's how to read your local index, according to a doctor, so you can stay safe.

The heat index shows how humidity makes hot days feel hotter, and why direct sun can push dangerous conditions even higher.

Tropical-like air will linger in Michigan this week causing many to stay indoors. To keep up with the temperature forecasts, you will need to know how the heat index works. Weather officials include ...

While you should remain in an air-conditioned room during the heat wave, if you do go outside you should do the following: ...

As summer temperatures rise, dairy cows are at greater risk for heat stress. Heat-stressed cows suffer from reduced dry matter intake, reducing milk production. Farmers may also notice reduced ...

Delaware will feel a dangerous heat wave starting Wednesday as temperatures start surging into triple digits. The National Weather Service has issued an extreme heat warning for New Castle County and ...

I lovingly refer to my hometown as “The Swamp.” My childhood house in the Atlanta suburbs sat in a wooded basin along the Chattahoochee River, an arrangement that seemed to trap humidity over the yard ...

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 ...

Florida has a well-earned reputation for its muggy, humid summers. Which heat is worse: Florida's "wet blanket" or Arizona's "furnace"? What does heat index really mean? Heat-related symptoms to watch ...