There is nothing here that's broken that can't be fixed, but it won't happen on its own. It's going to require a huge lift by the entire country of the United States of America and people on the ground taking personal responsibility for themselves. You cannot take it as a fait accompli that the city's going to come back.
The federal government was responsible for building the levees, engineering the levees, and consequentially, the federal government is responsible for repairing the damage that has been done, which has not been completed yet.