NEW YORK – A massive heat dome that sparked the first major heat wave of the summer brought record-breaking temperatures to cities from the Midwest to the Northeast this week, but some much-needed ...

Most of Delaware is under an extreme heat warning again as the heat index rises to above 100 degrees. See when temperatures will drop.

Tens of millions of Americans sweltered outside or sought air-conditioned refuge as an "extremely dangerous" heat wave ...

The heat wave caused disruptions to public transport across the Northeast. Amtrak said it will be forced to slow train speeds ...

During a heat wave, it is crucial for people to cool down at night to reduce their core body temperature and reduce the ...

Most of Delaware is under an extreme heat warning as a heat wave brings the heat index to above 100 degrees. See when ...

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

Happening now: Unpleasant muggy morning with lots of sunshine. Temperatures may climb even faster than Monday. Afternoon heat ...

"Dangerous heat will intensify across much of the Northeast and Mid-Atlantic early this week," meteorologist Jacob Hinson said.

Philadelphia faces dangerously high temperatures, with heat index values reaching 106°F, prompting a warning from the NWS.