As I understand it, New Orleans for years has had wetlands outside their area which protected against flooding by absorbing water. This had been interfered with by the
Army Corps of Engineers who are known to divert rivers from their natural course.

As to PDQ's assertion that everyone was provided for during Katrina, this is false.
Many were subjected to poor conditions in trailers that had harmful chemicals in their construction and the incident at the Superdome has to be a testimony to the inadequacies
of the response of Bush and McCain eating cake and playing guitar at a birthday party.
Blackwater patrolled the streets of New Orleans as paid mercenaries for the Bush government.

There is unmitigated propaganda taking place as to the ability of FEMA to do its job
since the agency has been gutted by the Bush Administration.