CHICAGO (WLS) -- An air quality alert was issued by the National Weather Service for the Chicago area. Chopper 7 captured as ...

Sensitive groups are advised to stay indoors and limit outdoor activities as pollution and ozone levels spike to unhealthy ...

Multiple U.S. states and Canadian provinces are experiencing poor air quality from wildfire smoke. Here's where.

The Indiana Department of Environmental Management said Northwest Indiana’s ozone levels are expected to be unhealthy for ...

CHICAGO (WLS) -- There is a chance of severe weather Wednesday afternoon. Wednesday will be very hot and humid, with highs in the low 90s. Between about 3 and 8 p.m., strong to severe storms are ...

Today is warm with an air quality alert in effect. Sensitive groups should take it easy again as we have elevated ozone ...

The EPA's Air Quality Index can tell you whether breathing outside air can be harmful. Here's how to read the scale to plan ...

Chicago's air quality alert continues due to Canadian wildfires, affecting sensitive groups and prompting health advisories.

The Illinois EPA declared an Air Pollution Action Day in the Chicago metro area. See today's air quality index forecast for Illinois.

The alert comes as humidity is expected to increase Tuesday, with high temperatures in the mid 80s to low 90s, with heat indices reaching 100 by Wednesday.