A swath of the Millhill neighborhood of Southwest Baltimore lost natural gas and water service early Tuesday — and gas outages may continue for several days, according to the utility operators.

At around 3:30 a.m., while Baltimore Department of Public Works crews were working on a 10-inch water main in the 300 block of Millington Ave., a 4-inch gas line was broken, statements from the DPW and Baltimore Gas and Electric Co. said Tuesday afternoon.

About 100 homes lost water along Millington Avenue between Frederick and Wilkens avenues and Ashton Street between Millington Avenue and Catherine Street, according to the DPW. Water was also shut off at a senior community in the 400 block of Millington Ave. and at Frederick Elementary School.

DPW spokesman Kurt Kocher said he expected everyone's water service to be restored by late evening.

Natural gas service, meanwhile, was being cut off to about 900 buildings in the community, according to BGE, because water entered the open gas line. Since BGE crews need to turn off the gas to each building individually before the water can be drained, the process of restoring gas service is expected to take several days, the company said.

Gas service had been turned off to more than half of the structures by 9 p.m. Tuesday, said BGE spokeswoman Linda Foy.

BGE is using automated telephone calls to inform affected customers that utility crews will need to enter buildings to turn off gas service. Customers can schedule a time for their gas to be turned off by calling BGE at 410-685-0123.

The utility company will work with city police and firefighters — and a local locksmith — to forcibly enter homes if they're not able to get in touch with residents or building owners. After water has been drained from the gas line and repairs are made, BGE will need to re-enter homes to turn each customer's gas back on.