More than 150 million Americans are under the highest level extreme heat alerts during a wave of above-average temperatures.

As many as 250 daily temperature records could be tied or broken this week as dozens of states in the East Coast, Midwest and ...

Heat alerts have been issued from Colorado to Maine, including more than 150 million Americans. Heat index values in the ...

An extremely dangerous heat wave is underway for the eastern half of the United States as a potent heat dome reaches its peak ...

An "extremely dangerous heat wave" is continuing to scorch a huge area of the eastern United States June 23, affecting tens ...

A heat dome is affecting parts of the East Coast and Midwest, leading to record-breaking temperatures just as summer gets ...

DC's heat wave is dangerous. Hydrate smart, avoid caffeine, wear light clothes, and rest often. If you feel off, cool down ...

A heat dome occurs when a large area of high pressure in the upper atmosphere acts as a reservoir, trapping heat and humidity ...

The rare June heat wave broke about 20 records on Sunday and is expected to break more on Monday. According to The Weather ...

A potentially life-threatening heat wave hit the East Coast of the United States on Monday, with temperatures expected to climb to 40 degrees Celsius (104 F) in the New York metropolitan area.

Just in time for summer, here comes the heat. "A dangerous ... dropping only into the mid-70s from the Great Lakes to the East Coast. That will offer little to no relief to those without adequate ...

which said the warm weather will bear down on the East Coast by Sunday and last well into next week. The heat wave will begin this weekend and last well into next week. (Photo by Gary Hershorn/Getty ...