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.

Numerous flash floods had been reported across New York, New Jersey and Connecticut, closing roads and highways, submerging cars, and stranding motorists, according to the National Weather Service. Metro-North reported suspensions of service on part of the Harlem line, and some delays on the New Haven line, as well, which has since been reopened.

This rare overlap of extreme heat and deluge is part of a broader pattern of volatile weather impacting much of the US this summer.

Two people died in New Jersey after their car was swept away. Public transit was largely running normally on Tuesday morning, hours after water flooded subway stations and damaged highways.

The National Weather Service is predicting a slight chance of more rain Tuesday, July 15, after torrential rain, flooding Monday in the Lower Hudson Valley.

The summer season is among the busiest parts of the year when it comes to air travel, but thousands of flights have been grounded this week after severe inclement weather. Flash flood warnings have been issued in several states to start the week after heavy rainfall.

Humidity levels in the tri–state area have been particularly unpleasant making the hot temperatures feel even warmer and a second heatwave could be on the way