We heard these loud banging noises all evening and into last night, sometimes shaking the whole house. It turns out those are mini ice quakes, since it went from +0c raining to -26c in a 12 hour period. Underground puddles freezing and expanding in the frozen ground.
Currently the river is smoking and the fog is crystallizing when it's blown up and away. -22c atm, high winds, sun is out. Recommended to stay indoors with windchill down to -35c.
Still not cold enough to try this though