We had a river house in St. Clair growing up. One time the hot water tank failed and leaked....for a long time. Everything in the house had to be thrown out, the walls were covered with mold, the carpet. That was a disaster. It was never the same.
That is why 3/4 of mine got gutted to the studs. When the back roof, wall, and windows went, the storm came in. They went a little far imo but mold is nothing to play with and you only get one shot with the insurance.
And considering some of the scary wiring we found behind the dry wall, it was a good thing. It is a wonder it had not burned down.