A broken heater inside a South Side high school left students in classrooms without normal heat circulation on a day with record cold temperatures.

An arctic air mass that brought snow and ice to an area stretching from the Rocky Mountains to northern New England on Monday was poised to give way to record-breaking cold temperatures.

While it’s still technically fall for another six weeks, you wouldn’t know it by looking outside. WGN meteorologist Demetrius Ivory tells us what’s ahead.

Air from Siberia — yes, Siberia — is heading toward a huge chunk of the United States and it could set record-low temperatures from Texas to New England.

Cracked bridges, eroding and disappearing beaches and massive flooding are taking a toll on Lake Shore Drive. We hear some ideas from aldermen about shoring up the lakefront.

Gov. J.B. Pritzker is asking the federal government to reconsider its decision to deny monetary aid to residents and businesses affected by near-record levels of flooding that hit Illinois this spring.

Earlier this year, for the first time ever a small team of scientists was able to forecast a severe tornado outbreak almost one month in advance. We speak with Victor Gensini, a key member of that team.

Illinois experienced more than 1,500 flood events from 2000 to 2018 – an average of 1.5 floods per week – resulting in $3 billion in property damages, according to a new report from the American Geophysical Union.

Steady rain throughout much of the spring led to the state’s worst flooding in more than 25 years, according to the Illinois Emergency Management Agency. More than two dozen counties can now apply for federal funding to help with recovery efforts.

Hurricane Dorian raked the Carolina coast with howling, window-rattling winds and sideways rain Thursday, spinning off tornadoes and knocking out power to more than 200,000 homes and businesses.

A day after the most powerful hurricane on record ever to hit the country finished mauling the islands of Abaco and Grand Bahama, emergency workers had yet to reach some stricken areas.

Hurricane Dorian pounded away at the Bahamas for a day and a half, devastating thousands of homes, trapping people and crippling hospitals. Atmospheric scientist Scott Collis of Argonne National Laboratory weighs in.

July was the hottest month measured on Earth since records began in 1880, the latest in a long line of peaks that scientists say backs up predictions for man-made climate change.

A trade war with China. Springtime floods. And now weeks without rain have combined to create a perfect storm battering Illinois farmers. Will a disaster declaration be enough to save them?

The move comes in the wake of near-record levels of flooding this spring that forced farmers to delay planting crops. 

As a heat wave moved across the Chicago area last week, polar and grizzly bears stayed cool at the zoo with fruit-filled blocks of ice weighing 300 pounds.