I repeat, several months of evacuation in that climate, given the extent of the flooding, means that everything except the structures of the newest & sturdiest buildings will be effective total losses.
Crime has nothing to do with it. Nature doesn't need any help from humans.
Exactly what I've been trying to tell people all day today. N.O. is virtually GONE... home of nearly a million people and associated business. A city that took hundreds of years to build. This is not any typical "flooding" event - it is unprecedented in American history.