New York City, Philadelphia are at the center of a serious Northeast flash flood threat

The Northeast — including New York City and Philadelphia — is at risk of significant and life-threatening flash flooding through Tuesday night from an unusually strong storm. Advertisement AdvertisementAdvertisement AdvertisementStorms have been active over parts of New York, New Jersey and Pennsylvania since Tuesday afternoon. The worst of the flood threat closer to the Interstate 95 corridor started to ramp up Tuesday evening. New York City can handle rates up to 1.75 inches per hour, but that threshold is getting surpassed more often. The most expansive flash flood threat will shift north on Wednesday into southern and central New England, including Boston and Hartford, but New York City will remain at risk too.