Ours came from the sump pump, all clean water not sewage, but still ruined everything. We lost about 40,000.00 and insurance only covered 10,000.00. Needless to say, walls, furnace and hot water tank. I had hard wood floors too. Had to put down vinyl, but wood grain. Also all my saw's and exercise things, treadmill, elipitical, weight's. whole lot's of stuff we used alot.