Even if people were paid the full market price for their house and property, what is the "full market price" for a condemned piece of property? It's pretty slick how they declare your property essentially worthless, then buy it for that amount.
Just by them showing up and poking around property becomes depressed as property values are dictated by buying activity. Who wants to buy property that they have their eyes on anyway?
In Florida, it's the ACOE using flooding as a weapon. Other places out West and elsewhere it's the DOI, Fish and Wildlife etc. that use drought and endangered species. Whatever works to kill the community.
Various organizations, same SOP.
Swoop in for some fake jumk science "crisis", devalue the land with flooding, drought, regulation whatever works. After the scourge, governmental and multi billion dollar non-governmentals purchase the property at bargain basement prices. They simply don't have the money to pay full price and even if they did, they wouldn't find the "willing sellers" to accomplsh their elaborate schemes.
They've got the system down pat and are using the same model all over the country.