Crews were working to repair multiple water main breaks in Baltimore County on Saturday morning, according to the Baltimore Department of Public Works, which maintains lines through the city and county.
The agency reported breaks near Weyburn Road, Pleasant Valley Drive, Hilltop Place and Notre Dame Avenue.
It said several dozen homes or businesses were affected by each break.
Temperatures were below freezing overnight and on Saturday morning, which the agency said can damage pipes.
The agency said it did not have an estimate for when repairs would be completed.