Crews are working to repair a massive sinkhole on an Upper West Side street, days before it sees an influx of people to the neighborhood for the annual Macy's Thanksgiving Day Parade. NY1's Gene Apodaca filed the following report.

Caved-in concrete was not what Diane Rudnick expected to see outside her Upper West Side home Monday morning.

"I hung out the window, and took a picture, and I said, 'Oh my God,'" Rudnick said.

A section of pavement gave way around 830 a.m., creating a sinkhole the size of two parked cars on West 82nd Street between Columbus Avenue and Central Park West.

Crews with the Department of Environmental Protection (DEP) shut off water to about 275 homes while they worked to determine what caused the ground to give way.

"Crews excavated down to the water main," department spokesperson Ted Timbers told me. "What they found was a defect on the service line from 56 West 82nd Street."

That building, a private co-op, will have to pay for installing a new water line, according to the DEP.

Les Hersh lives in that building, and he said he had noticed flooding in the basement the past couple of days.

"I thought there were pipes in the wall, but it was actually water coming in through the foundation," Hersh said.

DEP officials said that usually when they respond to sinkholes like the one they saw Monday, 80 percent of the time it's caused by a private line connected to a private building.

"There is insurance available that people can buy — service line protection, where it would be covered," Timbers said.

Water service was restored to the neighborhood while crews worked to repair the sink hole in time for the annual influx of cars and people to the neighborhood on Thanksgiving Eve for the blowing up of the big balloons used in the Macy's Parade the next day.

Lenore Levy said she has one more reason to be thankful: her new car was not parked in a spot where it would have been swallowed by the sinkhole.

"This is a place you always wished you had your car parked because we live here," the local resident said near the sinkhole. "But we're on Central Park West, thank God."

Con Edison said it sent a gas crew to the scene as a precaution. They said the break will have no impact on its steam or electric customers.

No injuries have been reported.