Well, strictly speaking, all of Florida is not very far above sea level, and it constantly is subject to hurricanes. Then there's San Francisco and Los Angeles that can suffer a major quake at any moment. Then there's those along the Ohio and Mississippi that are seasonally in danger. And the rest of the country - well Tornados seem to take care of them. Ok, so hindsight is 20-20. I say that we immediately evacuate anyone within 50 miles of a major body of water. That will hopefully prevent anyone from suffering a similar fate.
In the meantime, the people of NOLA got what they deserved and helping them will only lead them to ignore the errors of their way.