NPR's Brian Naylor reports on how the historic city of Frederick, Maryland, is dealing with water shortages caused by the continuing eastern drought. The mayor wants to impose a moratorium on new housing construction. Communities in western states are familiar with water shortages causing development restrictions, but in the east, this is more unusual. (4:29) NOTE: This report misstated the affiliation of drought expert Jim Boyd. He is a scholar at Resources for the Future.