It is a fool who builds his home upon the sand and remains there in the face of a Class 5 storm.
Perhaps the "It can't happen to me" syndrome took over.
Such is why Qaeda can have such a 2nd success. Now is a perfect time while we're distracted and our assets are so concentrated.
God shall have His mercy as we all pick up the pieces of broken and ended lives.
In a perfect world, that would have been good enough. But you aren't taking into account the disabled, ill and elderly. You aren't taking into account those that had no way to leave. Or the emergency personnel that stayed. You aren't factoring in an area that had no emergency plans and ineffectual officials.