How long can sealed milk be left out?

As long as it's kept cold it will be fine. As a youngster we had no fridge, so we stood the bottle in cold water overnight, still fine in the morning.

It should be ok, depending on how hot your house it

I would leave it in the fridge, it is still going to be the coldest place unless you have been flapping it open and closed like a headless chook because the fridge is off. Close the door and keep it shut.

Dune

Sit the jug of milk in ur freezer. Even tho the refridgerator is broke, the top freezer will remain cool for a few hours.

I wouldn't trust it. If it's cold outside where you are you could put it on the porch or garage, maybe even in your car. I wouldn't leave it out at room temperature.