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This week's freeze has resulted in thousands of flights and dozens of trains in the Midwest. Authorities in some of the most affected cities, such as Minneapolis, Detroit and Chicago, have implored residents to stay indoors to avoid frostbite and prevent motorists from driving on icy roads.
It will be about 125 degrees of temperature change over seven days, he said.
13 million people are on wind chill alert
Forecasters describe extremely fluctuating weather patterns as a badlash.
Thursday, at the height of the cold, more than 216 million people experienced temperatures below zero. Friday morning, about 13 million people were under warnings or advice regarding wind chill.
Temperatures in Chicago will skyrocket in the coming days – from a low of minus 23 degrees Fahrenheit on Wednesday to 50 on Monday – a change of more than 70 degrees, announced CNN weather forecaster Haley Brink. Atlanta shivered in the '20s this week but will bask in the' 60s by hosting the Super Bowl on Sunday.
Flooding is possible during thawing
Despite the outlook for higher temperatures, light snowfall fell Thursday night in the area, resulting in slippery roads and slower journeys. Before the weekend warms up, new snowfall will occur in parts of Illinois, Indiana and Ohio, the weather service announced.
When the Chicago temperature reaches freezing temperatures on Saturday, snow and ice will melt, which could cause flooding along the rivers as large chunks of ice and block the flow of water downstream. said Brink. Other risks include falling ice cubes that have formed on buildings.
"The average maximum in Chicago is 32 degrees Fahrenheit for this time of year," Brink said. "They go well below the average temperature to well above average."
11 states had lower temperatures than the city of Alaska
The brutal cold was so intense Thursday that at least 11 of the continental United States reached a lower temperature than recorded in the northernmost city of Alaska.
According to CNN meteorologist, Taylor Ward, the Dakotas, Minnesota, Illinois, Iowa, Indiana, Michigan, New Hampshire, Wisconsin, the State of New York and Pennsylvania all experienced a drop in temperatures below minus 14 degrees. It was the temperature at Utqiagvik (also known as Barrow), a town of about 4,400 inhabitants located north of the Arctic Circle.
At least 50 people were treated for frostbite in Chicago, a majority of whom were homeless. In such extreme conditions, frostbite can occur as quickly as three to ten minutes, depending on age, exposure, and other factors such as gloves and wet socks.
The cold climate also caused a phenomenon in Chicago called Cryoseism – noisy boom called "Frostquake". This happens when groundwater freezes and expands, causing soil and rock cracking.
Of the 23 deaths related to extreme weather this week, three occurred in Erie County in New York and two in Chicago. Among them was a person found dead at a bus stop and two men who were clearing snow, said Peter Anderson, spokesman for the Erie County Executive Office.
In Chicago, according to the Cook County Medical Examiner, the death of a 92-year-old man was caused by the cold.
Artemis Moshtaghian, Elizabeth Joseph and Yelena Dzhanova from CNN contributed to this report.
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