There's probably already an indirect impact happening to property values. Holding a mortgage requires flood insurance. Inside a 100 year flood zone it can be di

There's probably already an indirect impact happening to property values. Holding a mortgage requires flood insurance. Inside a 100 year flood zone it can be difficult and expensive to get flood coverage. If no one will cover you, you aren't getting that mortgage. As FEMA redraws 100 year flood zones, even a few inches of increased depth will cause many "dry" areas to be recategorized.