And the even bigger problem - where are you going to move them to? Anyplace within 150 miles is likely going to need its own shelters for local needs before this is over. (And the nearest non- coastal cities within easy range (Jackson and Baton Rouge) are both under 250,000 population. No way either of them could handle another 50,000 folks - both are packed with folks that got themselves that far. The nearest big cities are Houston, Dallas, Memphis and Birmingham.
That question will be not be meaningful if a disater befalls the SuperDome.
Same thing I've been thinking.....reports are, rooms full into Ark., Tyler, TX.....& traffic jams still heading for Houston.
NO would have to keep 1000's of buses on hand to attempt to make these one-way evacuations.