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

Once the Philadelphia region gets past the heat wave, unstable air returns, and the storm door will open through the weekend.

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

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

Heat doesn’t just mean canceled events. It also poses a health risk. If you can’t afford to cool the whole house, make a ...

The heat wave has arrived. Temperatures and humidity are climbing as the tri-state heads into an expected record-shattering ...

The National Weather Service issued an extreme heat warning for New Castle County lasting through June 25. See how hot ...

Beaches were filled Monday as daytime temps reached 95, just shy of a record for the date. Some relief is in sight late ...

The first heat wave of the summer has hit Boston, and people are braced for it. Temperatures could reach 100 degrees over the ...

The Chicago Fire Department responded to around 90 calls between the extreme heat and people in distress in the water, ...