Water has been restored to hundreds of families on the Upper West Side, after a water main break forced the DEP to shut off service.

The 12-inch, 120-year-old main broke around midnight between 105th and 106th Streets and Central Park West, quickly flooding into the subways.

The A and D trains were suspended, but service was restored by rush hour, with some delays.

The break also sent the water rushing up Central Park West.

The Department of Environmental Protection worked through the morning to replace the broken pipe. More than 200 families in three buildings were without water, and some without heat, for about 12 hours.

"It's a minor inconvenience,” said a resident without water. “I mean, I'm lucky I have a gym to go to. People who don't have that, who have young kids to get up or things like that, it's going to be a lot tougher because there's absolutely no water, so you can't shower there, no hot water there, nothing."

"Actually, I would shower and get ready and have breakfast and go to work, but this morning I couldn't really wash up,” said another. “In fact, I was lucky I had a gallon water in my refrigerator. I heated that up. I was able to wash up. Other than that, breakfast I'll have it in the office, once I get there I'll buy something."

"I woke up this morning and it was really cold and I really didn't know why until I turned on the news and I turned on the water, so I figured that's why,” said a third.

The DEP is investigating the cause of the break.