Yes, I am not saying that you can withstand any event. I have seen >3' of water next to a building with infrastructure in the ground level that were fine, thou

Yes, I am not saying that you can withstand any event. I have seen >3' of water next to a building with infrastructure in the ground level that were fine, though. Seepage barriers and sump pumps and elevating things a little bit can do more than you'd think. It's also worth noting that however high the storm surge is -- your infrastructure is probably at least a little above sea level.