Absolutely correct. Three years ago a home that we were renting in Cape Coral, FL had a flood that we discovered on arrival at 9pm (somehow the toilet feeder hose had disconnected sometime previously and put "only" 2-3 inches of water in 50% of the house). It was MUCH more than what was visibly wet that had to be removed. The water wicked up the walls to about 3 feet from the ceiling. EVERYTHING had to go..right down to the studs....and this was just from ground level water not from the roof. Mold was quite evident after less than a week.