You might look to see if the fridge condensation is causing that. Dometics have a drain tube that is supposed to go to the outside, but sometimes it doesn't... and the condensate drips onto the floor instead. Norcolds have a tray inside the fridge that needs to be emptied; failure to empty the tray could cause water to slosh out and exit the door.
Also, very humid weather like you're having could cause the fridge to sweat on its exterior, and that could be dripping down. If so, it's probably a rare event and should not be a long term problem.
I'm sure there are other possibilities, of course. Just a couple that came to mind.
