The Minnesota Pollution Control Agency has issued an air quality alert for parts of Minnesota, including the Twin Cities metro area, for Tuesday through Friday, as wildfires in the northern parts of the state and Canada continue. 

Hot temperatures and poor air quality can aggravate pre-existing health conditions and pose risks to people with asthma, heart disease, high blood pressure and diabetes, as well as pregnant women and children. 

At extreme levels, smoke inhalation can lead to asthma attacks, heart attacks and strokes, so MPCA is advising at-risk Minnesotans to stay indoors. If you have symptoms, call your healthcare provider or 911 in an emergency. 

The MPCA advises against “vigorous” outdoor activities, like sports, which could exacerbate any serious health or lung effects. 

The Boundary Waters Canoe Area Wilderness in northern Minnesota indefinitely closed on Tuesday as more than 20 wildfires have broken out as a result of lightning strikes and dry air caused by the ongoing heat wave. Evacuations are currently underway in the Boundary Waters. At least 17 people have been rescued with no reported injuries. 

Smoke from the Superior National Forest is expected to head south over the next 24 hours.

Look for hazy skies as smoke moves across northeastern Minnesota to the southern and western parts of the state. 

Even for those without preexisting health conditions, hazardous air quality can lead to shortness of breath, irritated eyes and nose, coughing and chest tightening. 

Smoky air is expected in Brainerd, Alexandria, Hinckley, St. Cloud, Winona, Moorhead, International Falls, Two Harbors, Hibbing, Ely, Duluth, and the Tribal Nations of Mille Lacs, Prairie Island, Leech Lake, White Earth, Red Lake, Grand Portage and Fond du Lac. 

Hazardous levels of smoke are expected in Two Harbors and Grant Portage; the MPCA advises residents there to avoid any outdoor activities and stay indoors. 

For Minnesotans, climate change-induced smoky skies and poor air quality are becoming a near annual summer event; the state Department of Natural Resources says 2025 was likely the smokiest year in five decades or more.