Stay ending early due to weather?

Currently in the middle of a stay that's supposed to end Saturday. The owners are on vacation, but I'm worried they may end up coming back early due to bad weather coming in. Has anyone ever had something like this happen? They haven't said anything yet, but I want to be prepared just in case. My refund policy is flexible, but in the case of something like this that's out of everyone's hands...I'm just not sure.