Just like the cleanup after 9/11, these things take time; often much longer than those not directly impacted realize.
My question is whether people will be allowed to rebuild on the most heavily impacted areas. (It might be cheaper to buy out the landowners than to build the levees etc. necessary to protect them against a category 5 hurricane.) The question then becomes where the people who lived there going to go.
They should probably try to convert the land that used to be wetlands back into wetlands again.