Not in my experience. There was a fire in the third floor unit of a building I was living in (one floor up and one unit over). It was a three floor building, so

Not in my experience. There was a fire in the third floor unit of a building I was living in (one floor up and one unit over). It was a three floor building, so that was a roof unit. The firefighters cut vent holes and were able to contain the damage to that unit.