NWS has issued a Flood Warning for the District of Columbia, effective until 1:45 AM. The Warning which previously covered only the Rock Creek area has been expanded to all of D.C. More heavy rainfall is expected to move over the area, and 1 to (locally) 3 inches of additional rain is forecast for the rest of Friday (this is a small increase in the rainfall forecast.) This will cause creeks and streams to rise out of their banks, as well as areas of urban flooding.
Citizens should stay away from creek and stream banks in flooded or recently flooded areas. Additionally, citizens should stay alert for high standing water in the road. If you come upon flood waters, turn around and go another way. The water might be deeper than you expect, and you could become stranded. Six inches of standing water is enough to stall some cars, a foot of water can float a vehicle, and two feet of moving water is enough to sweep a car away.