Social media users posted videos of water leaking from the roofs of crowded LIRR cars and water running down the aisle as a storm began during Monday evening’s commute, videos show.

One user posted a video to Twitter showing water dripping onto an LIRR seat, forcing a passenger to pick up her purse and move.

“LIRR is this what we pay hundreds of dollars a month for?? #raininthetrain,” the Twitter user wrote.

Melissa Guglielmo, 23, of West Babylon, was taking a nap on the 5:23 p.m. train out of Atlantic Terminal on the Babylon branch, when she felt water pour down from the roof of the car.

“We were at a train stop and all of a sudden it started raining,” Guglielmo said. “Once we pulled away, all the water started coming down and everyone in my row got soaking wet.”

She posted a video of rain leaking onto the seats with the caption: “Hey LIRR it literally started pouring rain in the train car today.. now I get to sit in soaking wet clothes for the rest of the way home.”

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Two videos show water leaking down from a light fixture in LIRR cars.

The LIRR replied to a handful of Twitter users, apologizing and asking for a car number to report for servicing.

MTA spokesman Shams Tarek told Newsday that the agency has not received any reports directly.

In addressing any concerns about water leaking through light fixtures, Tarek said electrical components are insulated and covered on trains: “Leaking rainwater is generally safe, but customers should exercise caution on slippery surfaces and report train info and car numbers to LIRR so that personnel can address specific issues.”

With Ellen Yan