OK, so for Irma, I left my car sealed up in the garage, I put it up on jackstands in the front, ramps in the rear. We did have flooding into the garage, but it barely touched the bottom of the front tires. During the storm we had evacuated to a hotel (wife, the think ahead person that she is, got us a nice suite for a week).
I was saying that if we get hit again (see Maria), and I haven't procured something to lift the car higher (like a Quick Jack) by then, I'll probably just take my car to the hotel (assuming the same place), and take my chances with it in the parking lot. There was no flooding at all, but there's always the chance for some wind related mishap (like flying debris).