Effects of Hurricane Katrina in New Orleans landfall in 2005, the project was between 60–90% complete with a projected date of completion estimated for 2015, nearly 50 years after authorization. Hurricane Georges in September 1998 galvanized some scientists, engineers and politicians into collective planning, "Scientific American" declared that "New Orleans is a disaster waiting to happen" in October 2001. However, even the most insistent calls from officials to evacuate ahead of Katrina did not warn that the levees could breach. On August 29th, 2005, flood walls and levees catastrophically failed throughout the metro area. Many collapsed well below design thresholds (17th Street and London Canals). Others collapsed
Hurricane preparedness for New Orleans from the Mississippi River. In 1947, the Fort Lauderdale hurricane struck the New Orleans area. There was moderate wind damage. Flood prevention was largely successful in Orleans Parish, but there was severe flooding in the new East Jefferson suburbs near the Lake. Hurricane Flossy in 1956 resulted in flooding in parts of Eastern New Orleans. Hurricane Betsy in 1965 alerted a new generation to the threat posed by major hurricanes. As radar showed the storm heading for the city, a mandatory evacuation of Eastern New Orleans was declared. The Mississippi River-Gulf Outlet Canal channeled storm surge into the metro area.