WRT safety of your stuff - it's fine. I've lived here 15 years, without having had anything major stolen. Most housing is raised so it has to be a major, major flood event for homes to flood. Usually hurricanes are more of an inconvenience than a threat. Once or twice a year you wind up driving somewhere for the weekend, sit around drinking and watching the news, and go back to find nothing has happened, except maybe some tree limbs down here and there. Obviously, last year was the exception we'd all feared would happen.
But y'know, barring another event of biblical proportions, there's no reason to think your stuff is in any more danger here than anywhere else. We wouldn't have all these old houses filled with antiques if major flooding were a regular event.