A deadly arctic deep freeze enveloped the US Midwest with record-breaking temperatures, triggering widespread closures of schools and businesses. According to the US National Weather Service, temperatures plunged as low as -48.3 degrees in northern Illinois, -37.2 degrees in the central part of the state and -31.6 degrees in southern Illinois. According to the Flightaware flight tracking website, snowfalls caused a flurry of cancellations and delays at Chicago's two major airports. US Postal Service had to take the rare step of suspending mail delivery service to a wide swath of the region. See the images of how residents are weathering the arctic cold.
Polar vortex descends on US Midwest bringing bone-chilling arctic cold
According to the US National Weather Service, temperatures plunged as low as -48.3 degrees in northern Illinois
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Pedestrians walk along Michigan Avenue above the frozen Chicago River in Chicago
© EPA-EFE/KAMIL KRZACZYNSKI The US Midwest braces for a cold snap as a polar vortex drives temperatures far below zero
© EPA-EFE/KAMIL KRZACZYNSKI A woman braves the freezing weather as she crosses a street in Chicago
© EPA-EFE/KAMIL KRZACZYNSKI Ice and snow builds up along Lake Michigan in Chicago
© EPA-EFE/KAMIL KRZACZYNSKI Ice and snow builds up along Lake Michigan in Chicago
© EPA-EFE/KAMIL KRZACZYNSKI High School students from China pose for pictures along Lake Michigan in Chicago
© EPA-EFE/KAMIL KRZACZYNSKI An emergency preparedness plan was issued ahead of a “historic” polar vortex of cold air and wind descending on the US Midwest
© EPA-EFE/KAMIL KRZACZYNSKI A woman braves the freezing weather in Chicago
© EPA-EFE/KAMIL KRZACZYNSKI A harbor light is covered with snow and ice on the Lake Michigan
© AP Photo/Nam Y. Huh Steam rises from the city as the sun rises in Chicago
© EPA-EFE/KAMIL KRZACZYNSKI Ice forms along the shore of Lake Michigan in Chicago
© AP Photo/Kiichiro Sato A Metra train moves southbound to downtown Chicago as the gas-fired switch heater on the rails keeps the ice and snow off the switches near Metra Western Avenue station in Chicago
© AP Photo/Kiichiro Sato Commuters wait for a train in Chicago
© AP Photo/Kiichiro Sato