Fast-moving water was seen rushing down the streets of Charleston, South Carolina, on Friday as the National Weather Service warned of “dangerous flash flooding.” The service said that by 4:20 p.m. local time on Friday, as much as 6 inches of rain had fallen. The risk continued in the area on Saturday, with the NWS issuing a coastal flood warning for Charleston and Colleton Counties ahead of the evening’s high tide. “Numerous roads will become impassable this evening,” the service warned, adding