my carpet is wet from water over flow, what can i do to prevent mold with out removing the carpet?

my laundry room (in the second floor)has a sink that overflow because of running water, the carpet is wet arround the laundry room & water traveld to the ceiling of the first floor dripping for about 30 min. now the ceiling is dry but my carpet is not, what can i do to prevent mold in the inner walls and carpet….please help!