Crews were scheduled to work over night to repair a water main break at 25 Swampscott Avenue.
The break was reported by police about 7 p.m. Thursday when an officer noticed water seeping through cracks in the asphalt near the gas station at corner of Paradise Road, said Gino Cresta, director of the Public Works Department.
The director called in a contractor to chase down the break in the 6-inch main and repair it.
He expected the crew would work through the night.
The flow of water to 10-12 homes was to be turned off once the break was found, the director said.
He hoped the repairs would be done and service restored by 7 a.m. Friday.
This is the first water main break that the director recalls on Swampscott Avenue.
The lines are about 50 to 60 years old there, he said.
This season has seen more water main breaks than the 2011-12 season, this being the fourth of the 2012-13 season.