A St. Paul firefighter works at the scene of a house fire during a arctic deep freeze on Wednesday, Jan. 30, 2019, In St. Paul, Minn. (David Joles/Star Tribune via AP)
A man holds a dog as they enter a building at North Clinton Street at West Kinzie Street in Chicago on a cold and frigid Friday morning, Jan. 25, 2019. An arctic blast spread painful cold across the Midwest on Friday, with more dangerous weather expected next week. (Jose M. Osorio/Chicago Tribune via AP)
People brave frigid conditions while making their ways around a train station, Friday, Jan. 25, 2019, in downtown Chicago. An arctic wave has wrapped parts of the Midwest in numbing cold, sending temperatures plunging and prompting officials to close dozens of schools Friday, but forecasters say the worst may be yet to come. (AP Photo/Kiichiro Sato)
Commuters wait in below zero temperatures for a CTA Red line train at the Belmont station, Friday, Jan. 25, 2019. An arctic blast spread painful cold across the Midwest on Friday, with more dangerous weather expected next week. (Steven Rosenberg/Chicago Tribune via AP)
Ice forms on Lake Michigan as cold weather envelops the city, as seen from 360 Chicago Observation Deck in Chicago, Friday, Jan. 25, 2019. An arctic blast spread painful cold across the Midwest on Friday, with more dangerous weather expected next week. (Antonio Perez/Chicago Tribune via AP)
Icicles form on a railing along the Chicago lakefront from North Avenue beach on a cold and frigid Friday morning, Jan. 25, 2019. An arctic blast spread painful cold across the Midwest on Friday, with more dangerous weather expected next week. (Jose M. Osorio/Chicago Tribune via AP)
Robert Delgado, with the Milwaukee Public Library, shovels in front of the Milwaukee Public Library in Milwaukee on Monday, Jan. 28, 2019. Heavy snow and gusting winds created blizzard-like conditions Monday across parts of the Midwest, prompting officials to close hundreds of schools, courthouses and businesses as forecasters warn that dangerously cold weather is right behind the snowstorm. (Mike De Sisti/Milwaukee Journal-Sentinel via AP)
Water vapor rises above St. Anthony Falls on the Mississippi River as the Stone Arch Bridge is obscured, seen from the Third Ave. Bridge Tuesday, Jan. 29, 2019, In Minneapolis. Extreme cold and record-breaking temperatures are crawling into parts of the Midwest after a powerful snowstorm pounded the region, and forecasters warn that the frigid weather could be life-threatening. (David Joles/Star Tribune via AP)
Evan Roberts is covered in frost while jogging across the Stone Arch Bridge Tuesday, Jan. 29, 2019, In Minneapolis. Extreme cold and record-breaking temperatures are crawling into parts of the Midwest after a powerful snowstorm pounded the region, and forecasters warn that the frigid weather could be life-threatening. Roberts, who is originally from New Zealand, said he will take tomorrow off from running outside and run inside on a treadmill. (David Joles/Star Tribune via AP)
James Merwin snow blows his driveway in Bayside in Milwaukee on Monday, Jan. 28, 2019. Heavy snow and gusting winds created blizzard-like conditions Monday across parts of the Midwest, prompting officials to close hundreds of schools, courthouses and businesses as forecasters warn that dangerously cold weather is right behind the snowstorm. (Mike De Sisti/Milwaukee Journal-Sentinel via AP)
A plow removes snow along West Wisconsin Avenue at North 8th Street in Milwaukee on Monday, Jan. 28, 2019. Heavy snow and gusting winds created blizzard-like conditions Monday across parts of the Midwest, prompting officials to close hundreds of schools, courthouses and businesses as forecasters warn that dangerously cold weather is right behind the snowstorm. (Mike De Sisti/Milwaukee Journal-Sentinel via AP)
A cyclist decked out in cold weather gear rides past the city skyline and a frozen Bde Maka Ska in Minneapolis. A blast of polar air enveloped much of the Midwest on Wednesday, closing schools and businesses and straining infrastructure across the Rust Belt with some of the lowest temperatures in a generation. (Anthony Souffle/Star Tribune via AP)
The sun rises along the shore of Lake Michigan at Montrose Harbor, Thursday, Jan. 31, 2019, in Chicago. The painfully cold weather system that put much of the Midwest into a historic deep freeze was expected to ease Thursday, though temperatures still tumbled to record lows in some places. (AP Photo/Kiichiro Sato)
A photographer sets up his tripod on the shore of Lake Michigan before sunrise, Thursday, Jan. 31, 2019, in Chicago. The painfully cold weather system that put much of the Midwest into a historic deep freeze was expected to ease Thursday, though temperatures still tumbled to record lows in some places. (AP Photo/Kiichiro Sato)
The sun rises behind trees along the shore of Lake Michigan at Montrose Harbor, Thursday, Jan. 31, 2019, in Chicago. The painfully cold weather system that put much of the Midwest into a historic deep freeze was expected to ease Thursday, though temperatures still tumbled to record lows in some places. (AP Photo/Kiichiro Sato)
Steam is backlit by the sunrise along a road in Roselle, Ill. on Thursday, Jan. 31, 2019. The cold weather system that put much of the Midwest into a historic deep freeze was expected to ease Thursday, though temperatures still tumbled to record lows in some places. (Bev Horne/Daily Herald via AP)
Steam rises in the DuPage County Forest Preserve in Warrenville, Ill, on Thursday Jan. 31, 2019. The cold weather system that put much of the Midwest into a historic deep freeze was expected to ease Thursday, though temperatures still tumbled to record lows in some places. (Bev Horne/Daily Herald via AP)
Jeff Roessler of Elgin, Ill., pauses at the side of the Fox River in South Elgin to take a photo Thursday, Jan. 31, 2019. The painfully cold weather system holding much of the Midwest in a historic deep freeze sent temperatures plunging to a record low in northern Illinois on Thursday. (Brian Hill/Daily Herald via AP)
Peter Sherman of Old Mill Creek, Ill., pushes his bike up to the Bakers Square in Libertyville, Ill., after a group ride Thursday, Jan. 31, 2019. The painfully cold weather system holding much of the Midwest in a historic deep freeze sent temperatures plunging to a record low in northern Illinois on Thursday. (Steve Lundy/Daily Herald via AP)
Icicles hang from the Harrington Inn in Geneva, Ill., as commuters pass by on Thursday, Jan. 31, 2019. The painfully cold weather system holding much of the Midwest in a historic deep freeze sent temperatures plunging to a record low in northern Illinois on Thursday. (Jeff Knox/Daily Herald via AP)
Matt Carlin of Libertyville, Ill., looks on after a bike ride with fellow cyclists from Lifestyle Cycle in Libertyville Thursday, Jan. 31, 2019 in Lake County, Ill. The painfully cold weather system holding much of the Midwest in a historic deep freeze sent temperatures plunging to a record low in northern Illinois on Thursday. (Steve Lundy/Daily Herald via AP)
A man talks on his phone while he checks for his flight at O'Hare International Airport in Chicago, Thursday, Jan. 31, 2019. The painfully cold weather system that put much of the Midwest into a historic deep freeze was expected to ease Thursday, though temperatures still tumbled to record lows in some places. (AP Photo/Nam Y. Huh)
Flight information screens show flight status information at O'Hare International Airport in Chicago, Thursday, Jan. 31, 2019. The painfully cold weather system that put much of the Midwest into a historic deep freeze was expected to ease Thursday, though temperatures still tumbled to record lows in some places. Disruptions caused by the cold will also persist, including power outages and canceled flights and trains. (AP Photo/Nam Y. Huh)
David Grall exhales as he clears a path to his mailbox on Thursday, Jan. 31, 2019, in the town of Polk, Wis. The painfully cold weather system that put much of the Midwest into a historic deep freeze was expected to ease Thursday, though temperatures still tumbled to record lows in some places. (John Ehlke/West Bend Daily News via AP)
Travelers check their flight status information at the American Airlines self ticket counter at O'Hare International Airport in Chicago, Thursday, Jan. 31, 2019. The painfully cold weather system that put much of the Midwest into a historic deep freeze was expected to ease Thursday, though temperatures still tumbled to record lows in some places. Disruptions caused by the cold will also persist, including power outages and canceled flights and trains. (AP Photo/Nam Y. Huh)
A flight information screen shows flight status information at O'Hare International Airport in Chicago, Thursday, Jan. 31, 2019. The painfully cold weather system that put much of the Midwest into a historic deep freeze was expected to ease Thursday, though temperatures still tumbled to record lows in some places. Disruptions caused by the cold will also persist, including power outages and canceled flights and trains. (AP Photo/Nam Y. Huh)
A homeless man sitting outside a coffee shop accepts cash from a customer on a bitter cold morning, Thursday, Jan. 31, 2019, in Portland, Maine, The polar vortex that's bringing misery to the upper Midwest is making an appearance in northern New England, where some places will struggle to reach the single digits. (AP Photo/Robert F. Bukaty)
An man stands outside the Kalamazoo Gospel Mission in Kalamazoo, Mich., on Wednesday, Jan. 30, 2019. The painfully cold weather system that put much of the Midwest into a historic deep freeze was expected to ease Thursday, though temperatures still tumbled to record lows in some places. (Joel Bissell/Kalamazoo Gazette via AP)
The sun rises along the shore of Lake Michigan at Montrose Harbor, Thursday, Jan. 31, 2019, in Chicago. The painfully cold weather system that put much of the Midwest into a historic deep freeze was expected to ease Thursday, though temperatures still tumbled to record lows in some places. (AP Photo/Kiichiro Sato)
An emergency shelter at the Douglass Community Association set up in coordination with City of Kalamazoo, Kalamazoo County and American Red Cross in Kalamazoo, Mich. on Wednesday, Jan. 30, 2019. The painfully cold weather system that put much of the Midwest into a historic deep freeze was expected to ease Thursday, though temperatures still tumbled to record lows in some places. (Joel Bissell/Kalamazoo Gazette via AP)
Heavy traffic is seen on Interstate 94 south bound, Friday, Jan. 25, 2019, in Chicago. Dangerously cold weekend weather will be followed by a storm that could leave more than 6 inches of snow on the ground before an arctic blast brings a three-day stretch "of potentially life-threatening cold" to the Chicago area, according to the National Weather Service. (AP Photo/Nam Y. Huh)
Ice forms along the shore of Lake Michigan before sunrise, Wednesday, Jan. 30, 2019, in Chicago. A deadly arctic deep freeze enveloped the Midwest with record-breaking temperatures on Wednesday, triggering widespread closures of schools and businesses, and prompting the U.S. Postal Service to take the rare step of suspending mail delivery to a wide swath of the region. (AP Photo/Kiichiro Sato)
Geese huddle in the water while the sun rises at the harbor in Port Washington, Wis., on Wednesday, Jan. 30, 2019, as a deadly arctic deep freeze enveloped the Midwest with record-breaking temperatures. (AP Photo/Jeffrey Phelps)
The sun is seen through ice formed on a window in Burnsville, Minn., Wednesday, Jan. 30, 2019, as a deadly arctic deep freeze enveloped the Midwest with record-breaking temperatures. (Brian Peterson/Star Tribune via AP)
Ice forms in an artistic manner on the inside widow of an air tight residential garage stairwell Wednesday, Jan. 30, 2019, in Chicago. A deadly arctic deep freeze enveloped the Midwest with record-breaking temperatures on Wednesday, triggering widespread closures of schools and businesses, and prompting the U.S. Postal Service to take the rare step of suspending mail delivery to a wide swath of the region. (Courtesy of R. Lolli Morrow via AP)
Traffic moves along Milwaukee avenue in Wheeling, Ill. Wednesday, Jan. 30, 2019. A deadly arctic deep freeze enveloped the Midwest with record-breaking temperatures on Wednesday, triggering widespread closures of schools and businesses, and prompting the U.S. Postal Service to take the rare step of suspending mail delivery to a wide swath of the region. (AP Photo/Nam Y. Huh)
St. Paul firefighters at the scene of a house fire during a arctic deep freeze on Wednesday, Jan. 30, 2019, In St. Paul, Minn. (David Joles/Star Tribune via AP)
