A dripping accident cause maybe two or three gallons of water to leak out of a second floor bathroom into the carpeted floor outside, which in turn soaked through and created two round stains (about 3 inches diameter) in the ceiling below.
I dried the carpet with a carpet "steamer" (sucks out 1.5 gallon of water) and a fan. Then I peeled open the carpet at the bathroom entrance and blew air under the carpet cushion, which along with the floor board is still moist. There is also some white powdery stuff on some of the floor board, which I think is rot. There is no decayed wood.
What else can I do to dry the area? I don't think it warrants ripping open the carpet and cutting a hole in the floor board since it is a one time problem. Is there a less drastic way to dry the area under the floorboard?