If you look at the design of the hurricane hut found at:http://www.hurricanehut.net/
I think it could survive the
waves if it is thick enough and grounded well. But I would
have to do more research about it to find out if it is storm
surge proof. It looks about the best of them in design for this kind of thing.
There is always the slim chance of a Tsunami if an asteroid
hit the water. I know that some scientists are growing concerned
about the possibility of an asteroid hitting the earth in the
future. Wouldn't it be nice if the U.S., Britain, Iran, North Korea, and Venezuela, who instead of preparing for war against each other, would all work together on missle technology that would be ready to go and use on any asteroid that may threaten the earth in the future. The asteroid could be exploded apart before it hit the earth. It seems to me it would be a much better use of money and could unite us against a common potential enemy.
"...and the second angel sounded, and something like a great mountain burning with fire was thrown into the sea...a third of the creatures that were in the sea and had life, died; and a third of the ships were destroyed." (Book of Revelation chapter 8, verses 8-9) Big asteroids that enter the earth's atmosphere resemble mountains with their conical shape and are burning also. Interesting, isn't it?