From reading more this morning, and going back to the statute that Dogmush posted, apparently it's from 1970 and meant for civil unrest, which might be why the local gov said they "made a mistake" applying it to a natural disaster. Regardless, FPC said that DeSantis will be working to remove the law altogether.
If it's from 1970, I'm pretty sure that at that time, Florida gun rights were similar to pre-Lubys Texas gun rights, where it was all "yay guns, but we don't want you carrying them in public".