And this will happen sooner than you think, because by and large the independent and resourceful people in N.O. got the hell out (they didn't wait for the Mandatory notice), and/or prepared to stay and be safe for more than one day.
What descended on the Dome and the Convention center were the helpless, the street punks, the stupid, and the welfare queens.
The only good thing about this is that the good people of Texas will not have to worry about their Job market being swamped by a bunch of unemployable rif-raf. Seems unlikely 1 in 1000 of these newly homeless will be seeking jobs any time soon.
My guess:
The people's republic of San Diego will find a way to ship these people to L.A. within 3 months.
Add in the substance abusers, alcoholics, and diseased.
Houston has plenty of Mesicans who will do the jobs the homeless won't do.