“One of the things about this event that makes it so remarkable is that the smoke is affecting such a large swath of the U.S,” said Jesse Berman, an assistant professor at the University of Minnesota School of Public Health and an expert on air quality. Air quality alerts for parts of the region were in place through Thursday. People in parts of New Jersey, Pennsylvania and elsewhere with heart disease, asthma and other health issues were told to avoid the outdoors. So far this year, Seattle and Portland have largely been spared the foul air. The smoke blowing to the East Coast was reminiscent of last fall, when large blazes burning in Oregon’s worst wildfire season in recent memory choked the local sky with pea-soup smoke but also affected air quality several thousand miles away.
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