I weathered Ike, (class 4), with a storm surge of 20ft. I went inland into a
canal that had depths of 5 ft under
keel, (it was protected from waves), and was surounded by high rises, (protected from wind). And tied off with 30 ft lines, (20 foot slack). The water reached the second floor of the high rises, and an observer stated my lines were fully stretched. Out of 16 lines, two broke. The boat came through without a scratch except the screens were peeled off of the windows. All of the boats that were tied up like mine survived. The others were sunk or sustained major damage, (IE ending up in the street or someones back yard). There is a marina in my area called Watergate that is surrounded by a high concrete wall, and floating docks. Many boats survived there also.
Moral
Find a protected spot away from the hurricane winds, (they may come from two sides if the eye passes over). Prepare for the projected storm surge, with many lines arrainged for maximum slack. strip the boat, you may never see it again. Remove ALL
canvas, (and screens). Try to locate your boat away from the main force of the storm, if possible. Help your neighbors to tie up, many boats were sunk when other boats tore loose and rammed them. At least two lines on every cleat, with snubbers. The lines all had stretches, and wear abrasion spots in spite of my best efforts to put on chaff protection. Debris and flying sharp objects cut several lines. Good luck. (luck favors the prepaired).