That seems how they do it in some of those poorer islands -- a guy I know who grew up in Barbados said they would do that -- their houses were made of grass and they would lay on the floor until the storm passed --- sometimes their houses were gone but it seems a grass house wouldn't be too costly to replace. Mobile homes might be more modern but when a strong storm comes, the only thing you should do is get someplace else.
Sanibel mayor just requested National Guard help.
Aftermath photos: at this link: http://www.news-press.com/news/weather/hurricane/index.html