What if they didn't have a way to evacuate? Maybe they didn't have cars, or not reliable enough to make that long of a drive. Maybe they didn't have enough money to go to a motel room for days on end.
Part of the problem for many of those who didn't leave is the government fostered reliance on the government, then essentially abandoned them when this threat surfaced.
Your screen name says it all---I just saw the same ALERT on Fox about the 9 INCHES in the French Quarter...
I can't believe it...9 inches..what am I missing, that the information is ALERT worthy?
That's exactly what I meant when I asked what people in New Orleans did before things like the Red Cross, FEMA, etc. even existed.