An intense storm system battered the Northeast with torrential rains and fierce winds on Monday, snarling traffic, delaying flights and knocking out power across the region.

Wind gusts of up to 50 mph were recorded, and more than two inches of rain has fallen throughout areas of New Jersey and New York, according to the National Weather Service. Weather-related warnings have been issued in more than a half dozen states along the East Coast from North Carolina to Maine.

Flooding across New York City and Philadelphia left streets completely underwater ahead of rush hour. Mass transit systems, including the New York City subway, experienced delays and cancelations.

Meanwhile, tens of thousands of people from Virginia to New Hampshire were without power, according to PowerOutage.us.