Associated Press

Record-Breaking Cold Coming to Midwest After Snowstorm

"You're talking about frostbite and hypothermia issues very quickly, like in a matter of minutes, maybe seconds," said meteorologist Brian Hurley

Extremely cold, record-breaking temperatures are settling across parts of the Midwest after a powerful snowstorm pounded the region overnight Monday, and forecasters are describing the subzero weather on the way as potentially life-threatening.

Minneapolis Public Schools have canceled classes through Wednesday, when the region will experience frigidly low temperatures not seen in a quarter century.

"You're talking about frostbite and hypothermia issues very quickly, like in a matter of minutes, maybe seconds," said Brian Hurley, a meteorologist with the Weather Prediction Center.

The cold also prompted officials to close hundreds of Michigan schools, including in Detroit, and some schools in eastern Iowa, while Chicago Public Schools officials said schools would be closed Wednesday. The Chicago Zoological Society, meanwhile, said it's closing the Brookfield Zoo on Wednesday and Thursday to ensure the safety of employees and animals. It's only the fourth time the zoo has closed during its 85-year history. 

Subzero temperatures will begin Tuesday but Wednesday is expected to be the worst. Wind chills in northern Illinois could fall to negative 55 degrees (negative 48 degrees Celsius), which the National Weather Service called "possibly life threatening." Minnesota temperatures could hit minus 30 degrees (negative 34 degrees Celsius) with a wind chill of negative 60 (negative 51 degrees Celsius). The potentially record-breaking low temperature forecast in Milwaukee is negative 28 degrees (negative 33 degrees Celsius), with a wind chill as low as negative 50 (negative 45 degrees Celsius). The current record of minus 26 degrees (negative 32 degrees Celsius) was set in 1996.

"That's 40 degrees below normal," Hurley said.

At O'Hare International Airport, the high temperature Wednesday is expected to be negative 14 degrees (negative 25 degrees Celsius), which would break a record set on Jan. 18, 1994.

Homeless shelters were preparing for the onslaught of cold. The Milwaukee Rescue Mission's call volume was "unusually high," but there should still be enough beds for those who need them, said the mission's president, Pat Vanderburgh. Charitable groups that operate warming places and shelters in Minneapolis were expanding hours and capacity "as they do whenever dangerous extreme temperature events occur," said Hennepin County Emergency Management Director Eric Waage. He said ambulance crews were handling all outside response incidents as being potentially life-threatening.

Chicago Mayor Rahm Emanuel urged residents to check on their neighbors and take safety precautions. He said city agencies are making sure homeless people are in shelters or offered space in warming buses.

"Dangerous cold, check on your neighbors, make sure you have adequate heat," NBC Chicago meteorologist Brant Miller said.

Cold weather advisories are in effect across a broad swath of the central U.S., from North Dakota to Missouri and spanning into Ohio. Temperatures will be as many as 20 degrees below average in parts of the Upper Great Lakes region and Upper Mississippi Valley, according to the National Weather Service.

The unusually frigid weather is attributed to a sudden warming way above the North Pole. A sudden blast of warm air from misplaced Moroccan heat last month made the normally super chilly air temperatures 20 miles (32 kilometers) above the North Pole rapidly rise about 125 degrees (70 degrees Celsius). That split the polar vortex into pieces, which then started to wander, according to Judah Cohen, a winter storm expert for Atmospheric Environmental Research, a commercial firm outside Boston. One of those polar vortex pieces is responsible for the subzero temperatures across the Midwest this week.

On Monday, snowplow drivers had trouble keeping up with the snow in Minnesota and Wisconsin, where some areas got as much as 15 inches (38 centimeters). Chicago-area commuters woke up to heavy snowfall, with more than 5 inches (12.7 centimeters) already on the ground. In Michigan, nonessential government offices were closed, including the Capitol.

A snow plow struck and killed a man in in the Chicago suburb of Libertyville. Libertyville police say the village plow truck hit the man about 9:50 a.m. Monday and he was pronounced dead at the scene. Officials haven't identified the man. An autopsy is planned for Tuesday.

Rare snowfall was also forecast for some southern states. Forecasters warned of up to 3 inches (7 centimeters) of snow in central Mississippi and Alabama by Tuesday morning and said temperatures will plummet as arctic cold blasts southward. Alabama Gov. Kay Ivey issued a state of emergency ahead of the storm.

The Priceville Police Department in Morgan County, Alabama, jokingly announced in a Facebook post Tuesday that "all crime and doing really dumb things" has been cancelled until further notice due to the possibility of snow.

Associated Press reporters Caryn Rousseau, Gretchen Ehlke and David Runk contributed to this report.

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