Overview

• National Weather Service and state agencies have declared air quality advisories in Michigan, Illinois, Indiana, Minnesota, New York, Vermont, Colorado and Maine through Wednesday night or into early Thursday morning
• Elevated ground-level ozone and fine smoke particles are driving readings into unhealthy levels, posing acute risks for children, older adults and people with respiratory or heart conditions
• Millions have been advised to reduce outdoor activity, avoid driving and limit vehicle emissions to curb ozone formation and exposure to haze
• Indiana’s Department of Environmental Management designated Wednesday an Air Quality Action Day as northwest counties face unhealthy ozone forecasts
• Maine’s Department of Environmental Protection reported fine particle pollution at “Unhealthy for Sensitive Groups,” urging residents to avoid strenuous outdoor work and watch for respiratory symptoms