Similar here, last couple nights around -34, up to -8 this morning so far. I am liking this temp better.
Day before yesterday I had a water trough malfunction so had the bowl lifted up to do some work. The culvert under the trough was full of water but I didn't have my sump pump with me to pump it out. Figured I'd get it later. I guess somehow when I lowered the bowl a grommet fell off the power wire and it became disconnected. Yesterday morning the water in the trough and in the culvert were frozen solid. Good times.