Overview

• The National Weather Service issued air quality advisories through Wednesday evening for Michigan, Illinois, Indiana, Minnesota, New York, Vermont and Colorado due to elevated ground-level ozone and particulate pollution
• Indiana’s Department of Environmental Management declared an Air Quality Action Day for Northwest Indiana as Chicago marked its second consecutive Air Pollution Action Day with an AQI peak of 122
• Officials warned that children, older adults and people with respiratory or cardiovascular conditions should limit outdoor exertion and avoid tasks that generate ozone
• State and local agencies coordinated alerts with staggered expiration times before midnight and forecasts call for pollutant levels to drop once a cold front moves in Thursday
• Meteorologists said lingering smoke aloft combined with light winds, sunny skies and stagnant conditions have intensified ozone formation