Pictures

PHOTOS: Polar Vortex

January 30, 2019 / 4:18 PM EST / CBS News

Steam hovers above Lake Michigan as temperatures dropped to -20 degrees F (-29C) on January 30, 2019 in Chicago, Illinois. - Frostbite warnings were issued for parts of the US Midwest on January 30, 2019, as temperatures colder than Antarctica grounded flights, forced schools and businesses to close and disrupted life for tens of millions. (Photo by JOSHUA LOTT / AFP) (Photo credit should read JOSHUA LOTT/AFP/Getty Images)

US-WEATHER-ENVIRONMENT

Marius Radoi keeps his balance as he walks on the edge of Lake Michigan's shore line as temperatures dropped to -20 degrees F (-29C) on January 30, 2019 in Chicago, Illinois. - Frostbite warnings were issued for parts of the US Midwest on January 30, 2019, as temperatures colder than Antarctica grounded flights, forced schools and businesses to close and disrupted life for tens of millions. (Photo by JOSHUA LOTT / AFP) (Photo credit should read JOSHUA LOTT/AFP/Getty Images)

US-WEATHER-ENVIRONMENT

A crew clears snow outside of US Bank Stadium on January 29, 2019 in Minneapolis, Minnesota. - The polar vortex is here -- tens of millions of people in the US braced on January 29, 2019, for a deep arctic chill, which authorities say could be life-threatening. Sub-zero temperatures already blanketing parts of Canada were already sweeping across the US Midwest and towards the East Coast. (Photo by STEPHEN MATUREN / AFP) (Photo credit should read STEPHEN MATUREN/AFP/Getty Images)

US-WEATHER-ENVIRONMENT

A view of downtown on January 29, 2019 in Minneapolis, Minnesota. - The polar vortex is here -- tens of millions of people in the US braced on January 29, 2019, for a deep arctic chill, which authorities say could be life-threatening. Sub-zero temperatures already blanketing parts of Canada were already sweeping across the US Midwest and towards the East Coast. (Photo by STEPHEN MATUREN / AFP) (Photo credit should read STEPHEN MATUREN/AFP/Getty Images)

US-WEATHER-ENVIRONMENT

A bicyclist braves the cold while riding through downtown on January 29, 2019 in Minneapolis, Minnesota. - The polar vortex is here -- tens of millions of people in the US braced on January 29, 2019, for a deep arctic chill, which authorities say could be life-threatening. Sub-zero temperatures already blanketing parts of Canada were already sweeping across the US Midwest and towards the East Coast. (Photo by STEPHEN MATUREN / AFP) (Photo credit should read STEPHEN MATUREN/AFP/Getty Images)

TOPSHOT-US-WEATHER-ENVIRONMENT

TOPSHOT - Pedestrians brave the cold to go for a walk on the Stone Arch Bridge on January 29, 2019 in Minneapolis, Minnesota. - The polar vortex is here -- tens of millions of people in the US braced on January 29, 2019, for a deep arctic chill, which authorities say could be life-threatening. Sub-zero temperatures already blanketing parts of Canada were already sweeping across the US Midwest and towards the East Coast. (Photo by STEPHEN MATUREN / AFP) (Photo credit should read STEPHEN MATUREN/AFP/Getty Images)

US-WEATHER-ENVIRONMENT

A general view of frozen Lake Harriet in Minneapolis, Minnesota on January 29, 2019. - The polar vortex is here -- tens of millions of people in the US braced on January 29, 2019, for a deep arctic chill, which authorities say could be life-threatening. Sub-zero temperatures already blanketing parts of Canada were already sweeping across the US Midwest and towards the East Coast. (Photo by Kerem Yucel / AFP) (Photo credit should read KEREM YUCEL/AFP/Getty Images)

Polar Vortex Brings Extreme Cold Temperatures To Chicago

CHICAGO, ILLINOIS - JANUARY 30: A commuter walks through downtown in sub-zero temperatures during an extremely light morning rush hour on January 30, 2019 in Chicago, Illinois. Businesses and schools have closed, Amtrak has suspended service into the city, more than a thousand flights have been cancelled and mail delivery has been suspended as the city copes with record-setting low temperatures. (Photo by Scott Olson/Getty Images)

Polar Vortex Brings Extreme Cold Temperatures To Chicago

CHICAGO, ILLINOIS - JANUARY 30: Ice covers the Chicago River on January 30, 2019 in Chicago, Illinois. Businesses and schools have closed, Amtrak has suspended service into the city, more than a thousand flights have been cancelled and mail delivery has been suspended as the city copes with record-setting low temperatures. (Photo by Scott Olson/Getty Images)

Polar Vortex Brings Extreme Cold Temperatures To Chicago

CHICAGO, ILLINOIS - JANUARY 30: The James Versluis breaks ice on the frozen Chicago River on January 30, 2019 in Chicago, Illinois. Businesses and schools have closed, Amtrak has suspended service into the city, more than a thousand flights have been cancelled and mail delivery has been suspended as the city copes with record-setting low temperatures. (Photo by Scott Olson/Getty Images)