Canadian wildfires are having another extreme season, and smoke is once again drifting south across the continent.
Air quality alerts went into effect for millions of people across the U.S. this week as haze crept over the Midwest, Northeast and even the mid-Atlantic. As of Wednesday, states as far south as Virginia had seen their air quality decline as a result of the smoke, according to the federal government’s air quality data tool AirNow.
Many of the worst blazes have been concentrated in the Canadian provinces of Manitoba and Saskatchewan, where government fire maps show dozens of hot spots.
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It’s the continuation of an already severe summer, according to the European Union’s Copernicus Atmospheric Monitoring System.
