I'm in the northern mountains of NYS (about an hour from the Montreal border). We're pretty used to the cold, but not this early in the year. They're forecasting windchill temperatures of -45F (-42.8C). Honestly, once it get's to about -10F, anything colder feels the same. You'd think you'd feel it more, but not in our experience.
Luckily, we have a wood stove that keeps us nice and toasty and since our home is solid log construction, all of our pipes are internal (nothing in the walls). It's been so cold here that even the dog doesn't like to stay out long (and he's a cold and snow lover!).
Take care, everyone, and be sure to look in on the elderly.