Houses are not watertight, especially garages. They fill up with water very fast.
The daughter of a neighbor and her husband live in Tampa. They bought a house that is built on stilts 10 feet in the air. Plus, they hang their belongings in the garage from the overhead joists. Nothing sits on the floor. They got a few inches of water but nothing was damaged. They also moved their cars to high ground.
I just heard a little while ago that the arriving tenants for their attached AirBnB decided to come even though the hurricane was about to hit. The tenants didn’t move their brand-new car to high ground a few blocks away and the car is now totaled.
It has been a few years since a buddy had condo reservations around Indian Shores. The owner or the management firm called him and told him not come down. There was a hurricane threatening the east coast and that many people drive to the other side of the state to get out of the way. Evidently it is a complete mess. Since he was retired, my buddy was able to delay the trip by a couple of weeks.