"flooded into downtown" . . . "Pittsburgh flood of 1936" . . "Schuylkill and Susquehanna Rivers flooded" . . "1936 St. Patrick's Day flood" . . "Pittsburgh flood of 1936" . . . "March 1936 flood" . . . "floods" . "flood" . "Great St. Patrick's Day flood of 1936" . "a major flood struck the Pittsburgh metropolitan area" . "Pittsburgh Flood 1936" . .