What's closed Wednesday due to the extreme cold:
U.S. Postal Service mail delivery
Most Minnesota school districts. For Thursday, many of the largest school districts in the Twin Cities metro and around the state have announced closures, including Anoka-Hennepin, St. Paul, Minneapolis, Duluth and St. Louis County.
University of Minnesota and other local colleges. The Univeristy of Minnesota is opening at noon on Thursday.
Lunds & Byerlys and Kowalski's grocery stores will close at 7 p.m.
Twin Cities museums. Here's a list
Several Twin Cities movie theaters, including all AMC theaters.
Ice Castles in Excelsior