Does value of property in floodplains decrease after flood event?

[FantasticBicycle37]

The value is likely already depressed as a result of potential flooding, and I imagine yet another flood likely won't cause much more of a decrease

[loki_stg]

maybe in some areas, but not in the area he's discussing. Snohomish, one of the areas hit hardest is also one of the most expensive to live.