Forgot to add: Those that have any skills or willingness to work will readily find jobs will find employment (easily!) in Texas, and I think that will be the majority of them. The rest will get sent back to NO.
I don't think the rich will go back (except fot the Dem machine types), so that will change the makeup considerably.
Eventually, there will be construction jobs in that whole Gulf Coast area....which will be some good employment opportunites...
I just cannot imagine moving my family back to a city that is below sea level though...even if I were rich, it just seems stupid.