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The National Weather Service says northern and central Illinois will see record-breaking low temperatures of 18 or 19 degrees below zero or colder on Tuesday and Wednesday.

In this Monday, July 24, 2017 file photo, Caterpillar loaders are parked in Middleton, Massachusetts.  (AP Photo / Elise Amendola)

Caterpillar fell well short of fourth-quarter profit expectations and the machine maker said that sales have begun to slow in China. Shares tumbled 10 percent at the opening bell Monday, the worst sell-off in more than seven years.

Chicago's lakefront is frozen over Friday, Jan. 25, 2019.  (Tyler LaRiviere / Chicago Sun-Times via AP)

Wednesday’s forecast shows a daytime high of around 14 degrees below zero, which would beat the city’s all-time coldest high of minus 11. When wind chills are factored in, temperatures could reach minus 35. 

Chaon Cross plays Dr. Rosalind Franklin in Anna Ziegler’s “Photograph 51” at Court Theatre. (Photo by Michael Brosilow)

Anna Ziegler’s play, now in a biting, emotionally vivid production at Court Theatre, shines a light on the visionary chemist who was crucial to the momentous scientific paper explaining the molecular structure of DNA.

Meet the founders of the Chicago Furniture Bank, which offers people in need an apartment’s worth of gently used furniture, including beds for each family member, for just $50.

(Google Maps)

Chicago facilities that process potentially harmful industrial materials must now take further steps to ensure they aren’t polluting surrounding neighborhoods.

(foudefoot60 / Pixabay)

A new report suggests Illinois could do more to attract data centers. What are they – and how are they important to the local economy?

(stevepb / Pixabay)

Monday marks the start of income tax filing season. Learn about what’s different this year in the wake of new tax laws.

Hudson, a polar bear at Brookfield Zoo (Courtesy Chicago Zoological Society)

Brookfield Zoo and Lincoln Park Zoo plan to close for parts of the week as record-breaking lows are expected to move into the area.

Commuters wait for a train as snow falls Monday, Jan. 28, 2019, in Chicago. (AP Photo / Kiichiro Sato)

How Chicagoans handled a snowy start to the week – and how the city is preparing for worsening conditions.

A still image from the Gillette commercial, “We Believe: The Best Men Can Be.”

What does a new ad campaign say about masculinity in the #MeToo era? We explore reactions both positive and negative to Gillette’s “We Believe” commercial.

Susana Mendoza, one of 14 candidates running for Chicago mayor, releases her ethics plan as early voting is set to begin Tuesday.

Watch the Jan. 28, 2019 full episode of “Chicago Tonight.”