DALLAS—U.S. Army Corps of Engineers flood risk reduction projects in the south central and southwestern United States prevented an estimated $13.3 billion in damages to local communities and infrastructure during the May-June 2015 flood event , according to recent calculations by Corps officials with the Southwestern Division in Dallas. The most damages prevented were in the greater Dallas-Fort Worth area, where the figure stood at $6.7 billion. Closely following was the greater Houston area with $6.4 billion in flood damages prevented.