No point in speculating, but my guess is that many thousands died in this storm, when the final accounting is done. If I am wrong, nothing would delight me more.
I think several thousand may be dead, but I've been cutting Louisiana out of my comments above. If I were forced to venture a guess, I would guess 600-800 in Mississippi and 2000+ in Louisiana. It may be much higher; I'll just be shocked if it is.
I hope it's even less than I'm guessing.