You can't sue God for sending the hurricane. You can't take responsibility for not getting out of the way of a very-well-tracked Category 5 hurricane that was very vocally predicted to steamroll the city. You can, however, ignore your idiocy and the fact that God isn't impressed with lawsuits, and sue the guys who weren't even born when the levies were built and who didn't have the funding to enhance them to withstand direct nuclear blasts yet somehow managed to shoestring them along so that they hadn't failed yet, until overwhelmed by a hurricane of a force that they were never designed to withstand in the first place. This is one lawsuit-happy nation. Might as well sue the Bluebird bus company for not making their evacuation buses waterproof and buoyant.
I'm sick of hearing folks who didn't bother to leave trying to blame everyone else. Shut up, fix your city, and get off the airwaves. Morons.