The hardwood floor will probabily washboard on you, but, it may level itself out as it dries. The floor (joists and subfloor) will be fine (won't collapse) they may just need to be dried out. The ceiling in the basement if it is drywalled may sag and some of the tape joints may pop. Or you may only end up with some stains and need a coat of paint.
Depending on how much damage is done and what your deductable is you may want to go through insurance and have someone come in and look at it and have it fixed.
I spent 9 years doing fire and flood restoration and have seen the damage that water can do.
Good luck.