The polar vortex brought disruption to air traffic and morning commutes, warnings of wind chills and frostbite, and brutally cold temperatures across a large portion of the United States.
In parts of the Midwest, temperatures reached as low as 40 degrees below zero and Chicago’s O’Hare International Airport canceled half of its flights because fuel supplies froze, Reuters reported.
At least four deaths were blamed on the frigid weather, including a 48-year-old man from Chicago who died of a heart attack shortly after shoveling snow and an elderly Indianapolis woman who was found outside her home.
Just what do these cold temperatures look like? Here are a few photos showing the effects of the polar vortex: