We have a 2nd floor, but I remember the images of those people stranded on their roofs during Hurricane Katrina, as the water covered their entire 2-story houses.
We're pretty good swimmers, but I don't want to swim with alligators and other scary critters, lol.
Ugh... praying Debby fizzles away - somehow.
The Katrina flooding occurred because the levees protecting the homes below sea level broke. If you know your elevation, that is a good start for planning.