Plumes of dense smoke from uncontained wildfires in Manitoba, Canada, will blow across more than 12 central and eastern states Friday and Saturday.
A milky haze will overtake Midwestern skies Friday, with the smoke low enough in the atmosphere to reduce air quality from Minnesota to Michigan and southward to Illinois and Ohio with the highest concentrations of smoke being found near the Great Lakes.
Air quality alerts are in effect for Minnesota, Michigan and Wisconsin, with the air quality index predicted to reach Level 3 — unhealthy for sensitive groups — or 4, unhealthy for all. These alerts mean people should avoid strenuous outdoor activities, especially those with heart disease and asthma, and keep windows closed to prevent smoke from getting indoors.
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