What is the heat index? Learn how humidity makes temperatures feel hotter, why it matters during New York's heat wave and ...

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.

Scorching temperatures, especially combined with high humidity, pose risks particularly for children, older people and those ...

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

New York state has entered its first heat wave of the summer - with highs expected to soar into the upper 90s and even past ...

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

As summer temperatures rise, dairy cows are at greater risk for heat stress. Heat-stressed cows suffer from reduced dry ...

In a novel experiment at the University of Cincinnati, researchers recently isolated kissing bugs, fruit flies, mosquitoes ...

Houston summer weather is starting earlier and lasting longer. See three charts that explain Texas heat, 100-degree days and rising temperatures.

Wednesday and Thursday, June 10-11, are forecast to be the hottest days this week in Michigan with 90-degree highs that will make it feel like you're stepping into 100-degree weather. Weather ...