Heavy smoke from wildfires burning in Canada and Minnesota is spreading across the Midwest and Northeast U.S. this week, creating hazardous air quality conditions and exposing millions to fine particulate matter. The smoke has prompted air quality alerts across several states and triggered evacuation orders in northern Minnesota.
Regional Air Quality Alerts
Minnesota officials issued an air quality alert effective Tuesday through Friday, citing very heavy smoke in the state’s northeastern corner. Air quality in regions including Two Harbors and the Tribal Nation of Grand Portage is expected to reach hazardous levels, rendering the air unsafe for everyone. In Michigan, the state’s environmental agency announced an air quality alert for the entire state on Wednesday. Additionally, multiple counties in western and central New York were placed under an air quality advisory through Wednesday night.
According to National Weather Service meteorologist Tyler Hasenstein, smoke is expected to spread across parts of the New England coast, northern Pennsylvania, Detroit, and Milwaukee by Wednesday afternoon. The plume could extend as far south as Washington, D.C., by midday Thursday.
Health Risks and Safety Recommendations
Experts warn that the combination of extreme heat and wildfire smoke poses significant health risks. Fine particle pollution can cause shortness of breath, coughing, dizziness, and fatigue, while aggravating chronic heart and lung conditions. Officials advise residents to stay indoors, close windows, and use air purifiers or air conditioners to keep indoor air cleaner. If outdoor activity is necessary, experts recommend wearing an N95 mask.
Dan Westervelt, an associate professor at Columbia University’s Climate School, noted that severe drought and high temperatures have created conditions that provide ample fuel for these wildfires. Research indicates that warming temperatures linked to the burning of coal, oil, and gas are contributing to more frequent and intense fire activity.
In the Boston area, where skies turned a brownish-yellow hue on Tuesday, air quality remains in the moderate to “unhealthy for sensitive groups” range. Residents across the Northeast should expect periods of hazy skies until a cold front pushes through the region.
Find more reporting in our News section.
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