Do they think they can survive 10 weeks in a high rise building?"
no electricity .. no AC, no elevator, probably windows that don't open .. not a good scenario.
bottom line on "emergency shelters" .....
it makes it easyer to find the bodies , keeps them in one place.
clean up can be a bitch .....
Oh, those windows will be "open" if New Orleans takes a direct hit. Heavy "commercial grade" windows may be able to withstand 100+ mph winds, but not debris flying at 100+ mph. And of course, once the debris starts flying, with tree limbs and roofing materials flying around and breaking windows, more airborne debris results.