Believe it or not most property in Golden Gate Estates was not in the flood plain, you'd be surprised how little is. Unless this happens of course.
Thing is that much of this stuff wasn't brewing when most of the property owners and farmers bought their plots. Some of the farms have been in families for generations.
That's one thing that makes this so infuriating. It shows that property owners can be minding their own business and along comes their own government using their own tax money to devalue vast amounts of private property on a whim. No matter how much research one does, there's not much one can do if the government decides to bring a scourge upon you.