You obviously don't know what you're talking about; the people left in the center of New Orleans are the poorest, least educated people. They don't even have cars to leave with.
No preparations were made to evacuate them.
Of course, the mayor was busy helicoptering HIS family out of town.
Scanner broadcast to all companies from the superintendent of the New Orleans Fire Department, thanking the firefighters for their work, and telling them to stow their gear and head for their "refuge of last resort." This follows similar orders for EMS and NOPD.
As already discussed, New Orleans, nor any other major city has the means to evacuate 100,000 people 100 miles away in 18 hours in an EMERGENCY situation.
Look, the guy may have been slow in ordering the evacuation but that is just a moot point.