More than 125 million Americans were under the highest level of extreme heat alerts during a wave of above-average ...

We made it! After several record-breaking days with excessive heat in the Philadelphia region, including the first day with ...

As previous disasters have laid bare the US’ vulnerabilities to other types of extreme weather, this week is revealing ...

The temperature in New York City has reached 100 degrees as the eastern U.S. sweltered under an extreme heat wave.

A major heat wave will persist through the end of the week in some areas of the country. Here's what to do while the ...

Central Park officially marked its first heat wave of the season on Wednesday as highs soared back into the 90s for the third ...

The first major heat wave of the summer will bring another day of dangerously high temperatures to the East Coast on ...

By Tuesday night — following the fourth hottest day on record in Boston — Mass General’s emergency department was slammed.

Another steamy day is on tap for Wednesday, but there's a risk of isolated thunderstorms that could pack small hail and ...

It is the second year in a row that a heat wave has hit the New York City region earlier than usual, as global warming is ...

Forecasters say isolated thunderstorm cells could become strong enough to produce small hail and wind gusts that could topple ...

Fourth of July is less than two weeks away. Will the heat wave be over by then? Here's the forecast for Illinois.