FEDERALSBURG, Md. —  Heavy rains caused serious flooding Sunday in parts of Maryland's Eastern Shore, washing out roads and forcing evacuations.

Federalsburg Mayor Betty Ballas declared an emergency for the town of about 2,600 on Sunday morning after 10 to 12 inches of rain fell overnight. About 30 people had to evacuate, police said.

There were reports of 4 to 5 feet of water in some areas, said Jeff Welsh, a spokesman for the Maryland Emergency Management Agency.

Some residents evacuated homes in the Galestown area, said Mike Ziegler, an assistant director of the emergency agency.

At least 20 roads were closed in Dorchester County, said a spokesman for the Maryland State Police.

And in Seaford, Del., between 10 and 15 people had to leave their homes, said a city spokeswoman.