Such events bring out the best in people, with selfless acts of heroism, and the worst, with armed looting diverting police from rescue work.
One question that must be asked, what can be done to prevent such devastation in the future, and if that can't be answered, should they rebuild on land which requires permanent flood defences?
It seems the worst of the problems are not from the hurricane itself, but from the damage to flood defences.
In the UK now, I believe you cannot get insurance on properties that lie on a known flood plain.
Brings another point up, actually, is there going to be a crisis in the insurance industry because of this?