10. I think the government needs to actively discourage people from building in the same places.
When something like this happens, the barrier islands should be condemned and left to return to nature. People should be allowed to rebuild elsewhere, say (picking a number) 5 miles inland. I've heard of entire towns being moved because they were in the flood plain of rivers, so why can't we do the same thing here? Just move the damn towns, lock, stock, and kitchen sink.
Don't incentivize rebuilding in the same locations, though. Give people the means to rebuild elsewhere.