A once in 60 year event is no reason to not do something. Dems will destroy a virtual wall 10 times before mother nature destroys a real wall once.
Build/rebuild if needed.
While events like that will certainly destroy a lot, and conspicuously, it is the day to day pounding from the elements that does ongoing damage. Hurricanes get a lot of press, but smaller storm events do a lot of damage a little at a time. The first job I had off of the farm was working marine construction, building/replacing seawalls and piers. Big storms brought in business, to be sure, but day to day wear and tear brought the majority of our work. Again, I'm not saying don't build it, just don't underestimate nor under fund the maintenance.