This polar vortex thingy is tricky. Last month when I was in NY I spent a couple days with my ex (with whom I argue about DB C, Tina, etc...) and when I awoke one morning it was 2 degrees above zero on the temp gauge outside the kitchen window. That is the coldest recorded temperature I have ever seen, although I have probably been out in cold as deep or deeper in my youth while skiing in Colorado or hiking in the White Mountains, but to see that kind of cold with my eyes was startling.
So, too, was going outside to get something from my car and the breaths I took made my chest hurt. Whew.