Relief is on the horizon as a large mass of cooler, less humid air —currently centered over the northern Plains — moves eastward. Humidity will gradually decrease starting Friday, July 18, with skies turning partly to mostly cloudy.

Severe storms hammered parts of the tri-state area Monday afternoon into the late evening hours, flooding City subways, prompting dozens of water rescues and triggering a state of emergency in hard-hit parts of New Jersey.

Thursday: A slight chance of showers and thunderstorms, mainly between 4 and 5 p.m. Mostly cloudy, then gradually becoming sunny, with a high near 93. Heat index values as high as 102. West wind 5 to 10 mph. Chance of precipitation is 20%.

The National Weather Service issued a heat advisory that includes Berks, Bucks, Chester, Delaware, Lehigh and Montgomery counties, as well as Mercer County in New Jersey.

A heat advisory will be in effect as 'oppressively hot with very humid conditions' hits Delaware on July 17. See the weather forecast.

A lightning strike at an archery range in New Jersey killed a man and injured 13 others Wednesday evening, according to police.

With a hot and juicy atmosphere, torrential downpours and flash flooding are back in play for at least part of New Jersey late Wednesday.

Just one day after a fast-moving storm swept through New Jersey, causing dramatic rescues, a home explosion, and multiple deaths, officials have issued both a Flood Watch and Heat Advisory for the region.

The intense thunderstorm may have looked and sounded like a tornado, but that's not what happened, according to forecasters who examined the damage.