The problem probably isn't the situation 364.8 days per year, but what happens that one time every few years when weather (typhoons) and maybe even the tides al

The problem probably isn't the situation 364.8 days per year, but what happens that one time every few years when weather (typhoons) and maybe even the tides align to create conditions much worse than average for just a few hours. See New Orleans... the worst part is that because it's so rare most people (and media) will rant against the "waste of taxpayer money". You have to build very expensive infrastructure that's almost never needed, that goes against human nature it seems to me.