A heat wave will blast much of the eastern U.S. this week, and forecasters say temperatures will feel even hotter because of ...

"These levels of heat mean health impacts become more likely in general," the National Weather Service warned.

Dangerous heat could coincide with July 4 festivities as a heat dome pushes temperatures into the 90s and low 100s.

Forecasters warned that heat index values could reach as high as 115 degrees in some areas, with the most severe conditions ...

Boston and New England are now into one of the most intense stretches of extreme, triple-digit heat on record. A massive heat ...

In parts of the East, this could be the strongest, longest heat wave in almost 15 years. Here's what you need to know about ...

A federal heat risk map from NOAA's Climate Prediction Center shows roughly 30 U.S. states quietly building toward dangerous, ...

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 Chicago area is set to see its hottest weather of the season this week, but which parts of the region will be most ...

Add Yahoo as a preferred source to see more of our stories on Google. States across the central and eastern U.S. are under extreme heat watches and warnings as the areas face a dangerous heat wave ...

Texas is expected to heat up sharply as the World Cup begins, with widespread 90-degree temperatures and pockets of triple-digit heat statewide.