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Nightwings I figured it was C not F. When you had posted about the cold I immediately wondered/worried about you/all your neighbors [national neighbors, not nextdoor ☺] that might be experiencing power outages and I had almost asked you then. A few hours later I saw some international reporting on the power outages there and while I usually like being right about things, I didn't want to be right about that. I feel so sad for you all.
I'm in Minnesota in US so those temps are normal winter for me, but I know that can get dangerous with no heat.
The hot water bottle is an excellent idea. Might at least take some chill off even if its only momentarily?
I think back to what people used to do without central heating way back before industrialization. I presume some neighbors have woodburing stoves and fireplaces? Perhaps someone could source an old or assemble a new bed warmer for the neighbor and bring them some hot coals from time to time?
https://en.wikipedia.org/wiki/Bed_warmer