There is a guaranteed way to eliminate hurricane damage to private property. Abandon development in areas likely to experience hurricanes and the costs will disappear. Until then, measuring hurricane damage by comparing monetary repairs is a way the extremists can "prove" their narrative that GW is creating increasingly destructive hurricanes.
The most expensive hurricane ever was Miami, 1926. I think the most expensive flood ever was the Great Flood of 1951 in Kansas, although I'm not sure. Flood costs are normalized to GDP and the Miami costs are normalized for insured value.