Arctic Freeze

We are in the middle of an arctic freeze.  All that very cold air is coming down from Canada.  It is -3 this morning with a wind chill way down in the minus 30's.  You can get frostbite in 10 or 15 minutes.  So you better be dressed good and warm and not stay outside long.  I heard Minnesota schools are closed.  One gal on TV from Minnesota said they never close schools there so this is very unusual.