Smoke from Canadian wildfires continues to plague the Upper Midwest and Great Lakes region, with multiple states under air quality alerts.

-Detroit's air quality is unhealthy for sensitive groups Wednesday as Canadian wildfire smoke spreads as far as Europe. -Minneapolis hospitals report increased respiratory visits, urge people to limit outdoor activities until conditions improve. -Pulmonologist says patients should not delay seeking care for respiratory symptoms.

Smoke from Canadian wildfires is beginning to worsen air quality in the eastern U.S. as several Midwestern states battle conditions deemed unhealthy by the federal government