When the First Baptist Church in Roan Mountain, Tennessee had its first flood, it was devastating. That was in 1998, when the former church building took on at least six feet of water, according to pastor Geren Street. It wasn’t salvageable, and had to be torn down. The church relocated, constructing a new building a mile up the road, on a hill and not next to the river.

So this time around, when the devastation…