Baltimore is under a flood warning through Sunday night as the remnants of Tropical Storm Gordon and a stalled front drench the region.
The National Weather Service said a widespread 2-4 inches of rain is forecast across Maryland, causing ponding to develop on roadways and streams and creeks to overflow their banks.
Many roads around the region were closed because of high water, including State Route 450 between Huntwood Drive and Rutland Road in Anne Arundel County, Dock Street in downtown Annapolis and State Route 831 at Union Bridge Road in Carroll County.
Several state parks were closed because of tidal flooding, including the Avalon area of Patapsco Valley State Park and Point Lookout State Park. Beaches were closed at Assateague State Park because of 12-foot waves and higher than normal tides.
Wind warnings were in effect on both the Bay Bridge and the Francis Scott Key Bridge.
More than 2 inches of rain had already fallen at Baltimore-Washington International Thurgood Marshall Airport from Saturday afternoon through 4 p.m. Sunday.
A flood watch remains in effect through late Sunday night.
The remnants of Gordon were moving through the Ohio Valley and toward the Great Lakes on Sunday, and spreading moisture eastward to a front stalled over Virginia and Maryland.