We got hit by the same storm system in NC, a little sooner than DC. I drove to work Weds and Thurs as I have no interest in biking during torrential rains. We got 4+ inches in the rain gauge in my yard, and some areas got well over 12 inches. Since Monday, we've gotten nearly 8 inches of rain at my house, and some areas got more than 20 inches. Around here, they tend to put the MUPs in floodplains along streams and creeks, which are the first areas to flood during heavy rain.