School closures as sub-zero cold chills US Midwest

Bitter arctic air settled over the US Midwest on Friday, leading to school closures and event cancelations as officials warned of even frostier weather to come next week. The National Weather Service (NWS) forecasted that the chill would last through the weekend in the upper Midwest -- but "dangerously cold" temperatures are expected next week, with scattered heavy snow and strong winds. "There is increasing confidence in significant, bitterly cold air arriving in the Northern Plains, Midwest and Great Lakes in the middle of next week," the NWS said.