Four months is more than enough for some situations, just right for others and for what is hopefully a few, quite inadequate. So what specific scenario are we discussing?

Certainly even for a cat 5 hurricane, you are fine, provided that your supplies remain undamaged and are accessible. Connected to the mainland, Florida is logistically easier than Puerto Rico. What was your experience with Maria?

If the dino asteroid strikes on the Yucatan coast, as it did 65 mill ago, Florida and a great deal of the US will immediately have no further worries...