More heavy rain and thunderstorms hit New York City Monday, disrupting MTA and NJ Transit service, as the region continues to cope with scattered power outages and flooding left behind by strong July 4 weekend storms.

Multiple waves of heavy rain and storms are expected to continue through Monday night and could produce total rainfall up to 3 inches, with locally higher amounts, the National Weather Service said. Hourly rainfall amounts up to 2 inches are possible, which could lead to flash flooding.

The heaviest rain was expected during the morning commute, alongside wind gusts up to 50 mph, the city warned. The mayor’s office said it has mobilized an emergency response, clearing catch basins, checking flood-prone neighborhoods and warning those living in basement apartments.

“Limit travel if you can, plan for delays and take these warnings seriously,” Mayor Zohran Mamdani said in a statement. “If heavy rain begins, if the winds pick up or if you hear thunder — get inside and wait out the dangerous conditions.”

The MTA at 11:30 a.m. Monday said service is suspended on the Staten Island Railway between Huguenot and Tottenville while workers remove water from the tracks near Richmond Valley. The agency said normal service had returned to the LIRR and Metro North after earlier cancellations.

MTA also reported severe delays on the B and Q subway lines, as well as delays on the 7 line.

NJ Transit was also coping with weather-related issues, with the Raritan Valley line suspended in both directions following severe storms. The Morris and Essex and Gladstone Branch rail service remain suspended with limited service between Summit and New York Penn.

Flooding conditions in Camden prompted NJ Transit to suspend River Line service in both directions between the Waterfront Entertainment Center and Walter Rand Transportation Center. And the North Jersey Coast Line service is reporting up-to-30-minute delays between Long Branch and Bay Head because of weather-related signal issues.

Meantime, ConEdison said it has restored power to most of the 173,700 customers hit by outages caused by severe storms and stifling heat, many of them in Yonkers, Mount Vernon, Rye and New Rochelle. The utility’s tracker showed pockets of outages across the boroughs.

In New Jersey, PSE&G reported as of midday Monday that about 17,000 customers remain without power in clusters spread throughout the state. Meantime, Jersey Central Power & Light reported it had about 40,000 customers without power.

As of midday Monday the region’s airports were operating with minimal delays despite the heavy rain, according to Flightaware data.

This is a developing story and may be updated.