"We can't be sure which cat did it, because we don't have cameras in there, but we have a good idea because there was one younger female cat who really liked playing in sinks," volunteer Terry Arbour told the Miami Herald. "There was a tall spout in that sink that moves around, and the cat somehow was able to turn it on. It's possible there was collusion from others, but she probably had something to do with it."
According to ABC News, the shelter is closed on Tuesday and Wednesday allowing extra time for the water to fill up.
The flood caused three to four inches of standing water, which damaged floors, cabinets walls and also ruined several bags of cat food and litter.
None of the 30 cats at the shelter during the flood were harmed, but some will be relocated during the renovation process.
The suspected culprit has since been adopted, but the Humane Society remains holding the bill for the damage.
"It's quite a mess," Arbour said. "And we can't imagine what our next water bill is going to look like."