Conditions will stay mostly sunny and mainly dry for the first half of the weekend. There will be a bit of a haze out there.

On Saturday at 3:45 p.m. an air quality alert was reported by the National Weather Service in effect until Monday at midnight ...

“Air quality levels in outdoor air are predicted to be greater than an Air Quality Index value of 100 for the pollutant of ...

An air quality alert was issued Thursday by the National Weather Service for the entire Chicago area through Friday night.