After Katrina, I thought we should have had like a big public works project.
Dig several million ponds across the mid-west, and raise the low laying areas about 20 feet.
Settle the ground, and build the new houses on the raised ground.
The french quarter is much higher already.
If a person owned a lot, they still have the same lot, just higher.
It does look like they have fixed the problem, shell beach storm surge got to 14', and the tide gates held.
14' may have topped the old flood walls, those flood walls are now behind a flood gate that got closed
as the storm approached.