I have a theory about why so many communities still lie in ruins 6 months after Katrina...
 
God is protecting His people in the Bible Believing South.
 
A greater destructive force (Hurricane or otherwise) could be on the way.  By keeping those people out of their homes or ready to evacuate out of their trailers on a hair-trigger notice with the next catastrophe, God is showing mercy on the people affected by Katrina.
 
There are still over 150,000 New Orleans evacuees in Houston six months after Katrina.  Why?  Insurance companies are dragging their feet to pay home owners for the damage on their homes.  Why?  We can all answer these questions with human reasons, but God has the ultimate answer to these questions.  Is he sparing His people from something even more devastating by keeping them away from these low lying coastal areas?
 
Just a theory, but something to consider...