Overview
- The Minnesota Pollution Control Agency issued a same‑day air quality alert for the Twin Cities metro and parts of central Minnesota on June 9 that ran from noon to 9 p.m. with ozone forecast to peak in the afternoon at AQI orange.
- Unhealthy ozone can aggravate asthma, emphysema and COPD and may cause shortness of breath, wheezing, throat soreness, coughing or unusual fatigue in sensitive groups.
- Ozone forms when volatile organic compounds and nitrogen oxides from vehicles, industry and similar sources react with strong sunlight under warm, low‑humidity conditions; unlike wildfire smoke, ozone is a gas that typical particulate‑filtering masks do not remove.
- The MPCA advised people to limit or postpone outdoor exertion, use inhalers as prescribed, reduce driving, carpool or take transit, refuel at dawn or dusk, postpone gasoline‑powered lawn equipment and avoid backyard fires to cut exposure and lower emissions.
- Forecasters and local coverage warned that a strong El Niño and a warmer, drier season raise the odds of more ozone action days this summer, making continued alerts and targeted pollution‑cutting actions likely.