Ummm…. did I miss something? From the Chartered Institute of Building:
New Orleans flood protection gets upgrade – but not in time for next hurricane season
Five months before the deadline of 1st June 2006 for restoring the New Orleans levee system to the Category 3 storm protection status it held at the time of the Hurricane Katrina onslaught last August, the White House agreed in mid-December to rebuilding the system to Category 4 standards