So sorry to hear this. This is our first year keeping chickens and I've been afraid of electrical to the coop from the get go. We would have to run a heavy cord and the coop is too close to our house if the worse ever happened. The girls seem to have acclimated to their first winter and we just run water containers back and forth several times a day when it's real cold, especially when they're not out like today. I can't believe they're even laying eggs, but that slowed down a few days ago with the four that were laying daily.
Unfortunately that doesn't work when you have 30 chickens,you kind of need something to keep the water from freezing.