Chicago, Illinois – Unhealthy air has settled over the Chicago metro area and northwest Indiana, prompting an air quality alert that remains in effect through Tuesday evening. Residents—especially those in sensitive groups—are urged to limit prolonged outdoor activity as elevated ozone levels and lingering wildfire smoke push air quality to unhealthy levels.
According to the National Weather Service and Illinois EPA, the alert runs through 8 p.m. Tuesday, July 15. The Air Quality Index is expected to reach levels considered unhealthy for children, older adults, and anyone with respiratory conditions. Chicago, Gary, Hammond, and surrounding communities are included in the warning, with both Illinois and Indiana environmental agencies declaring air pollution action days.
People in Cook County, Lake County, and Porter County should reduce time spent outdoors and watch for symptoms like coughing or shortness of breath. Health officials recommend running air conditioners on recirculate and postponing strenuous outdoor activities until air quality improves.
This alert comes amid a summer stretch marked by repeated wildfire smoke intrusions across the Midwest. Similar conditions were seen in June, when ozone spikes led to health advisories across the region.
Unhealthy air may persist into Wednesday if weather conditions do not change. Residents should monitor local alerts for updates and visit airnow.gov for the latest air quality information.
