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An air quality index of 300 or higher is considered hazardous, and the record-breaking smoke AQI in Grand Portage reached 800 ...
3don MSN
Smoke from Canadian wildfires has carried another day of poor air quality south of the border to the American Midwest.
Wildfires scorching several Canadian provinces have driven at least 33,400 people from their homes, with smoke now reaching ...
Minnesota authorities warned of unhealthy levels of exposure to particles from wildfires. Symptoms include shortness of ...
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