Residents in the Upper Midwest are facing serious health risks as dense smoke from Canadian wildfires engulfs the region, creating dangerous air quality levels. Doctors are advising individuals, especially those sensitive to poor air, to limit outdoor activities. The smoke has caused numerous alerts across Minnesota and Wisconsin, with forecasts predicting continued poor air quality and potential stormy weather. Sports events have been canceled, and overall tourism in Minnesota has taken a hit. While some forecasts indicate that air quality may improve later, authorities urge caution, as more smoke could return. As the air quality remains at unhealthy levels, millions are advised to stay indoors and avoid strenuous activities.