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Chicago's lakefront is covered with ice on Wednesday, Jan. 30, 2019. Temperatures are plummeting in Chicago as officials warn against venturing out into the dangerously cold weather. (AP Photo/Teresa Crawford)

“Since temperatures are expected to stay at dangerous levels through Thursday, we are canceling school to ensure families have ample time to plan ahead,” CPS CEO Janice Jackson said in a statement Tuesday.

Reflections of a snowy city are seen in the 110-ton stainless steel Anish Kapoor sculpture called “Cloud Gate” at Millennium Park in Chicago, Sunday, Jan. 27, 2019. (AP Photo / Nam Y. Huh)

A deadly arctic deep freeze enveloped the Midwest with record-breaking temperatures on Wednesday, triggering widespread closures of schools and businesses, and the canceling of more than 1,500 flights from Chicago's airports. 

(Mike Mozart / Flickr)

The world’s biggest hamburger chain said sales rose 4.4 percent at established locations in the fourth quarter and 4.5 percent for the year.  

In this Feb. 5, 2018, file photo a Boeing 737 MAX 7, the newest version of Boeing's fastest-selling airplane, is displayed during a debut for employees and media of the new jet in Renton, Wash. (AP Photo / Elaine Thompson, File)

Boeing reported annual revenue of more than $100 billion for the first time and shares soared after the company easily beat Wall Street’s profit and sales expectations for the fourth quarter.

A person navigates a snowy Adams Street on a Divvy bicycle on Monday, Jan. 28, 2019. (Rich Hein / Chicago Sun-Times via AP)

With temperatures nearing record lows across the Midwest, frostbite can occur in a matter of minutes. We ask a local surgeon about frostbite symptoms, treatment and prevention.

Swallows huddled together during a snowstorm (Keith Williams / Flickr)

Unlike humans, birds do not have the luxury of high-powered heating systems to keep warm in the winter, but they do have a variety of unique adaptations to help them survive.

Amid a stunning corruption scandal that includes government raids, undercover moles, Viagra and massage parlors, Joe Ferguson has called for reform of the City Council’s culture.

Just how historic is Wednesday’s polar punch, and how are city agencies helping residents cope?

Chicago is seldom brought to its knees by brutal weather conditions, but Wednesday was a rare exception. And while subzero temperatures made the outdoors dangerous, they also created extreme beauty.

While Chicago Public Schools students make plans for their futures, we speak with schools chief Janice Jackson about the present.

Ald. Danny Solis (WTTW News file photo)

Shocking news from City Hall as the scandal touches the statehouse. Political reporters Carol Marin, Paris Schutz and Amanda Vinicky dive into the story in this week’s roundtable.

When walking through Chicago’s older neighborhoods, you can often find hints about the history of their buildings just by looking up. Geoffrey Baer looks back – and up – at some architectural gems.

Watch the Jan. 30, 2019 full episode of “Chicago Tonight.”