Smoke from Canadian wildfires is . Air quality warnings are in effect across the Midwest as officials warn of hazardous conditions.
Here's what we're following:
Chicago's air quality was the worst of anywhere in the world at one point yesterday, . The Illinois city had an air quality rating of "unhealthy" as of 9 a.m. local time.
Meteorologists expect Michigan's air quality to fluctuate this week between unhealthy for sensitive groups and unhealthy for everyone, . An official with the American Lung Association warned all residents to take precautions.
A thick haze is moving from Erie and the Great Lakes region across Pittsburgh, . A code red air quality alert issued by the Pennsylvania Department of Environmental Protection is in effect for several counties all day Wednesday.
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For more on the impact of the Canadian wildfires on air quality across the US,
Newsrooms from across the NPR Network contributed to this coverage.
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