Air Quality

An air quality alert has been issued for parts of northwest Indiana, with some residents advised to limit their time outdoors due to elevated ozone levels.

Alicia Roman has the latest forecast for the Chicago area.

Poor air quality was expected across the entire Chicago area Tuesday as an “air quality alert” was issued for all of Northeastern Illinois and Northwest Indiana through midnight.

Alicia Roman has the latest forecast.

Jenn Schanz has details from experts on how to stay safe during excessive heat in the Chicago area.

With heat and humidity building in the Chicago area, an air quality alert has been issued as officials warn of elevated ozone and particulate levels.

Hot days ahead with a slight chance of storms today and Sunday morning

Wildfire smoke from western Canada and the western United States could create some air quality issues in the Chicago area this week.

Alicia Roman has the latest forecast.

An air quality alert is in effect for some parts of the Chicago as heat and humidity continue across the area for a fourth straight day.

Alicia Roman has the latest forecast for the Chicago area.

An air quality alert has been issued for parts of northwest Indiana this week, as elevated ozone levels are expected to grip the region on Wednesday.

Iisha Scott has the latest forecast.

Why is air quality expected to be so bad in Chicago and parts of Illinois Monday that it sparked an alert from the Environmental Protection Agency?

Alicia Roman has the latest forecast update for the Chicago area.

An air quality alert has been issued by the Illinois Environmental Protection Agency Monday, with air quality expected to be at levels that are “unhealthy for sensitive groups.”

Heat, humidity and air quality alerts continue for most of the Chicago area Monday, with temperatures in the mid 90s and heat indices upwards of 100 degrees, the NBC 5 Storm Team said.

NBC 5 Storm Team Meteorologist Pete Sack has what to expect for Sunday night and beyond.

With heat and humidity building in the Chicago area, an air quality alert has been issued as officials warn of elevated ozone and particulate levels.

With heat and humidity building in the Chicago area, an air quality alert has been issued as officials warn of elevated ozone and particulate levels.