Without even a measurement, look to the old practices for houses - second story with strong frame for anything of value, ground floor stuff is disposable or cleanable.
now what to do about the car …..
i grew up in rice country. All houses were elevated with a least a crawl
space if not a second story. Floods were only an inconvenience. Pity the poor souls that build on grade since it is a little cheaper. But we all pay in terms of the cost of insurance and devastation from their risk taking.
Cyclones on the other hand…