[Yahoo! News}- A blast of super cold Arctic air known as a “polar vortex” is whipping through the Midwest this week, freezing over lakes and cityscapes and creating life-threatening conditions for residents.
Wind chill temperatures on Wednesday were expected to drop to as low as -60 in Minnesota and -50 degrees in Illinois, prompting school districts to cancel classes and the U.S. Postal Service to suspend deliveries in some areas.
The historic deep freeze has transformed the Midwest into a deadly winter wonderland.
Check out some of the most bone-chilling photos below: