It became a Cat 5 storm about 40 hours before making landfall.
You still don't play games even with a Category 3 Hurricane
Especially when your city is BELOW sea level
You get the heck out of there ... PRONTO!
So if the people were not properly evacuated with Hurricane Ivan 2004 and prior Hurricane George, why would they think the same incompetant AZZ Mayor & Govenor would save them this time?