Daily flooding caused by high tides will occur in the District and Annapolis within three decades as sea levels continue to rise due to global warming, a new study says. The study by the Union of Concerned Scientists predicts that by 2045 the nation’s capital and the capital of Maryland will experience about 400 floods per year, sometimes twice in a single day, and several other cities and towns on the Atlantic coast will have tidal flooding almost as bad. Miami, Atlantic City, Cape May, N.J., and Lewisetta and Windmill Point, both on the Chesapeake Bay in Virginia, can expect at least 240 days of flooding by 2045. High-tide floods along the Atlantic coast in Baltimore, Norfolk, Philadelphia, Charleston, S.C., Key West, Fla., and Sandy Hook, […]