Mr Buddy BIG Buddy with a 12" hose for 20lb tank as a last ditch effort. We also have a few propane tanks in reserve. If it came to the BB propane unit. The 2nd floor would be shut down including water turned off and lines drained. Turn 1 room in to living quarters close hanging blankets up to contain warmth, PLUS multiple layers of light clothing.
Main back up is a 6500W gen with switch box.