Weather forecasters are warning that more flooding is possible in the northeastern United States, following days of heavy rain that flooded roads and forced evacuations.
The capital, Washington, D.C., remains under a state of emergency Wednesday. Some federal government buildings are closed because of water damage.
Outside Washington, more than 2,000 people were evacuated overnight in Montgomery County, Maryland, from an area surrounding a swollen lake.
Elsewhere in Maryland, three people were killed Tuesday when rushing water swept them off the back of a pickup truck.
A police official also says two teenagers in Maryland are missing after they were last seen heading to a swollen creek Tuesday. Rescuers continue to search for the pair.
Forecasters say up to 30 centimeters of rain have fallen on Washington since Friday.
Severe flooding has also occurred in New York and Pennsylvania. A state of emergency has been declared in 10 counties in New York.
Some information for this report was provided by AP.