Eighteen states throughout the U.S. could see extreme heat this week with temperatures soaring past 100 degrees.

The nation's hottest official temperature climbed to 107 degrees, while the coldest reading fell to 19 degrees. Here's where ...

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

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

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

Meteorologists say temperatures across Boston and much of southern New England will climb into the 100s later this week ahead ...

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

New York City agencies are coordinating a response to the extreme weather later this week as the forecast becomes clearer heading into the heatwave.

Thursday will be another very hot and humid day as the metro area sits well south and east of a stationary front that ...

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

Millions of Americans could soon face dangerous and potentially life-threatening conditions as a heat wave descends on the ...

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.