This morning the toilet overflowed and there was a pool of water on the bathroom floor. It was cleaned up with towels and the toilet was plunged and seems to be working well. Several hours later several feet away from where the toilet is located one floor below there is now a wet spot on the drywall ceiling. It does not seem to be expanding. Our theory is that perhaps the water leaked down between the trim and the baseboard vent/heater and is now saturated through but we are unsure. Does anybody have any opinions on whether this is likely to cause problems or whether we should monitor for the next 24 to 48 hours. Might it cause mold in the future? Any help would be appreciated.