Record-breaking cold shuts down schools in the Midwest

MILWAUKEE -- Hundreds of schools and several large universities closed their campuses Tuesday as temperatures plummeted across the Midwest, with forecasters warning that the frigid weather will get worse and could be life-threatening. The extreme cold and record-breaking temperatures are crawling into a swath of states spanning from North Dakota to Missouri and into Ohio after a powerful snowstorm pounded the region earlier this week. Arctic air early Tuesday dropped temperatures in the Dakotas