A Chicago police officer shot and killed a fellow officer during a tactical operation Thursday night, police said. CPD said ...

CHICAGO (WLS) -- An Air Quality Alert remains in effect Friday due to smoke from Canadian wildfires. The alert remains in effect for the area until midnight Friday. ABC7 Accuweather Meteorologist ...

The Chicago Transit Authority has released video from inside the Yellow Line train that collided with a piece of snow ...

Air quality remains the top concern in the Chicago area today, with levels still considered unhealthy for sensitive groups.

An air quality alert remains in effect for the entire Chicago area, with another "Air Pollution Action Day" alert declared as ...

Hazy skies from fires are reminiscent of 2023 when Chicago was the second-most-polluted major city in the country.