About 100 homes in Baltimore County are without water after a 12-inch water main broke in two places, a spokesman for the city Department of Public Works said Tuesday.

Harford Road is closed in both directions between Joppa and Northwind roads, said Kurt Kocher, the spokesman, and the crews had to shut off a 24-inch main to repair the ruptures.

The Baltimore Department of Public Works is overseeing the repairs.

Kocher wouldn't say how long water service would be out. The area, near Carney Elementary School, is mostly residential, but there are a few businesses that may have lower water pressure, he said.

"I'm definitely not guaranteeing anything for the morning," he said. "It will definitely be a problem traffic-wise if nothing else."

Crews will work overnight to repair the breaks.