From what I've read, this freeper's community leaders have not issued any evacuation orders yet. They will hold a meeting tomorrow and come up with a plan and a guideline for their residents and go from there, depending on the nhc's predicted path. You assume too much too quick.
This note was posted about people in or near Houston. I have been watching all day stories about how Houston is evacuating the NO refugees from shelters, elderly and sick from hospitals and nursing homes, and encouraging people to leave. It's true that I haven't yet seen a mandatory evacuation notice (there might have been one, but I didn't see any), but if the authorities are evacuating everyone they could possibly move, then anyone who can get out themselves has plenty of warning.