Meanwhile inside my rental property....
After 48 hours without power and an overnight low of -20C approaching, I was tasked with draining the pipes and shutting down the hotwater-gas heating system to prevent damage.
Without power, the furnace pump was not operating, the water in the rads was still and becoming stagnant. The building plumbing was also at risk, with all the tenets having gone to friends places, it was safe to drain all the water from the building.
As I vented the heating system I was watching the steam from my breath and noticed a 4C reading in the boiler room. I was really worried about the pipes!