On Sunday evening, another rainstorm drenched the Baltimore area, turning gutters into rivers and streams into muddy torrents.A day earlier, heavy rainfall caused the worst flooding in two decades along the Rappahanock River in Virginia, inundating several homes.And on May 27, flash floods devastated historic Ellicott City, Maryland, for the second time in as many years, flipping cars and killing a National Guard sergeant.May turned out to be the third rainiest in Maryland history, with eight inches falling, more than twice the average for that month, according to National Weather Service monitoring at BWI airport. So far in June, almost 5 more inches of rain have fallen – about a third more than is normal for a June.