Remember Tuesday? When southern Ontario registered wind chill temperatures near –40 C? When Iqaluit saw 100 km/h winds, with gusts reaching 150 km/h? The weather was no less punishing in many parts of the U.S., especially across the Midwest, where entire vehicles froze over. But as bad as the weather was, it was also responsible for images of great beauty. We've chosen some of the best photos from the U.S.'s polar vortex of a week and put them together in the gallery above.