New Orleans had a stroke of luck as it turns out. There was a convention of EMS professionals in town when Katrina hit. There were several who stayed through the hurricane and were onhand. Some were able to assist with medical treatment in various locations around the city. Others had to struggle just to make it to safety.
There are many firsthand accounts at EMSNetwork News .
Here are some you should start with.
Hurricane Katrina - Our Experiences
The account of two EMTs who were stranded in the French Quarter away from the Superdome and the convention center.
Katrina Through the Eyes of an EMT
The account of an EMT who helped Kenner police officers before the levee broke.
Mason trio lived Dome nightmare - Ohio
Three EMS professionals who helped treat the ill and injured at the Superdome during the hurricane.
There are many more accounts and apparently more are coming in. This is probably a good site to keep an eye on.
(catholic school survivor)
PS: I just wanted to add that some of the accounts relate questionable, even abhorrent behavior by some police officers and other public servants, so I just want to be sure that people remember that this misbehavior is a failure of leadership. We can understand that most of the "looters" were probably driven to steal out of desperation, not greed, so we should also remember that the officers who behaved unfairly were in almost the same situation, but were given the impossible task of keeping order in a situation that was completely out of control. If these men had the numbers, organization, equipment and supplies they needed, all of which failed to appear, I believe we would have heard very different stories about them, just as we would not have heard so many stories of "criminal activity" among the survivors. I would really hate to see New Orleans police officers treated the way some Vietnam veterans were. It's not their fault they were put into such an untenable position by incompetent, potentially criminally negligent "leadership".
Just my $0.02.