It will be very hard to convince me that 100k people in New Orleans
> were incapable of leaving in advance. Many poor people have cars, or
> have friends/families with cars. There were enough cars in NO to > evacuate everyone.
Maybe you're having problems being convinced since you're well off enough to have a vehicle to take you where you need to go. Many people in the area are poor and probably had no way to move themselves and their families out of there. I'm not sure why you're assuming that there are enough cars in New Orleans to evacuate everyone.