capacity the swimming pool prepped and ready for the memorial day weekend until a wall of water and mud rushed in. >> it started going into the swimming pool. it's just weird because it's just a brown -- like the blob that oozes. you can see it moving all the way over. then it came more and more. then you heard it take the deck and all of the stuff out and you hear the cracks and the roars. there were trees, trees down there. and of course they're gone. >> reporter: joanne whose father started the camp in 1946 said she's seen the pool flood before. but this time was different. >> this water is just coming up so fast. >> reporter: the entire campground some 400 people forced to flee to higher ground in the dark just before water demolished these cabins. >> all we could do was her because it was the middle of the night. you could hear big trees cracking and glass breaking and moving. so we really didn't know till