Wildfire smoke may be more toxic than usual
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Forecasters warn that hazy, grayish-blue skies could persist for many weeks as fires continue to burn, though most smoke will remain high in the atmosphere.
Smoke from wildfires raging in Canada has drifted into the United States, affecting air quality as far south as Florida.
Despite expected rain Sunday night, Canadian wildfire smoke will continue to impact Michigan on Monday, officials say.
Hazy skies from fires are reminiscent of 2023 when Chicago was the second-most-polluted major city in the country.