Not biggest, but most costly. Andrew was much more powerful... luckily it didn’t lay a direct hit on the city of Miami.
I think the sayings “another Katrina” or “its no Katrina” should be reserved for hurricanes in the path of New Orleans.
Katrina “the hurricane” would not be a household name if it didn’t hit a city below sea-level surrounded by inadequate levies. It wasn’t the storm of all storms.