Midwest bundles up as bitter cold grips region Associated Press Copyright 2013 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Updated 11:40 am, Tuesday, January 22, 2013 (AP) — Homeless people scrambled to find shelter, schools shut down and plumbers wrestled with frozen pipes Tuesday as the upper Midwest endured a third straight day of bitter cold temperatures. Waves of frigid Arctic air began sweeping south from Canada on Saturday night, locking the Midwest into a deep freeze that has left a section of the country well-acquainted with winter's pains reeling. Ariana Laffey, a 30-year-old homeless woman, kept warm with a blanket, three pairs of pants and six shirts as she sat on a milk crate begging near Chicago's Willis Tower Tuesday morning. [...] in Sioux Falls, S.D., where winter temperatures are normally well below freezing, some homeless shelters had open beds. Shelters suspect people who needed their help were probably already getting temperatures are so low there in winter. Police in Milwaukee, where the temperature was just 2 degrees at noon, checked under freeway overpasses to find the homeless and urge them to find a shelter. Districts in Duluth, Minn., and Ashland, Bayfield, Hurly, Washburn and Superior in far northern Wisconsin closed amid warnings that the wicked wind chills could freeze exposed flesh within a minute.