At some point earlier today, Chris noticed a slow leak in the basement, and traced it to the hot water supply for the heating system. The brand new heating system that was installed earlier this year as part of the remodeling. Since the supply line is PEX, which is hard to imagine failing, the leak is presumably from the one joint in the supply line. A joint that is buried inside the walls.
The slow leak has now turned into a stream, and Chris is (rightly) afraid of the damage it will cause if he lets it keep going.
So we now have no heat.
Fortunately, I have lots of blankets. And two down comforters. Also good news is that it's not supposed to get below 42F / 5C tonight.