A record-breaking heat wave continued to roast much of the Northeast on Wednesday, with the National Weather Service forecasting unusually high temperatures in the region.

The service has issued an "excessive heat warning" until 8 p.m. Wednesday for parts of eastern Pennsylvania and parts of Delaware and New Jersey. The warning covers cities that include Philadelphia, Pennsylvania; Wilmington, Delaware and Trenton, New Jersey.

Officials advise people to stay indoors as prolonged heat and humidity creates a "dangerous situation."

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