Good morning, Maeve! If I were living in a 23-degree indoor environment, I would have tears frozen to my face. You and Truelove are much hardier than I. And having frozen pipes, too . . . . I remember being without running water, and I was not a happy camper (even though I was living in a house). I hope today (I'm posting past midnight) is warmer than yesterday. The only thing I can suggest is wool (or electric mattress pads which, since heat rises, are, I hope, more effective than electric blankets).