Much of the United States is having one of their coldest days in recorded history Monday.
In the upper Midwest, temperatures are hovering around -50 degrees if you factor in the wind chill. The polar-vortex hype has lived up to expectations.
The video below if from Denver area on Sunday, where temperatures were below freezing. You can watch crash after crash on this icy stretch of highway. The biggest one happens at about the 1:30 mark, when a large van slams into about a half-dozen vehicles.
So if it's colder outside than inside of your freezer, please be extremely careful driving around today. For yourself and others.
(Note: Video contains foul language.)