Dover Township public works director Charles Farley said Monday night that a ruptured water main meant a loss of service for between 120 and 150 homes in the area of Pine Road. Crews were working on a fix, he said.
Farley said he hoped many customers would be back online by morning. But "major work" will need to be done on lines under Pine Road, he said.
"We probably won't start addressing that until tomorrow," he said Monday night.
Earlier in the day, a contractor struck a gas line on Pine Road, said Russell Bedell, a spokesman for Columbia Gas of Pennsylvania. Six mobile homes were initially evacuated.
"We were able to make the situation safe again, and residents returned to their homes," Bedell said.
But because of the incident, gas was turned off to between 20 and 25 residents along Pine Road, he said.
Shortly after that, the water main problem occurred, Bedell said, adding that the gas line now cannot be repaired until the water is fixed.
Bedell said one person sought and received shelter through the American Red Cross.
Farley said it was not immediately clear what caused the water main break or if it was related to the gas issue. Crews will examine that more closely on Tuesday.
Michael Berger, a Pine Road resident, said his wife took their three children, including an infant, to stay at her mother's house. Berger elected to stick it out on a frigid night, with the help of a space heater.
"This is our house," he said. "Everything I've got is tied up right here."