From what I gleamed off of several articles on the internet, the issue has been ignored for decades. Supposedly funding had been allocated for the problem, but was re-allocated to other areas since a major hurricane never seemd to swerve that way.
It's just another example of reactionary thinking. Don't worry about it till it happens, then will throw money at it. It's not much different than the way our society deals with education, foreign policy, infrastructure, etc.
All I can say is, it's just too bad they didn't make it a mandatory evacuation from the start. All we can hope for is that we learn from the mistakes made, and it won't happen again.
jcwbnimble.