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Smoke from Canadian wildfires is causing unhealthy air across North Dakota and Minnesota, with doctors warning of serious ...
With smoke drifting over the Sacramento region from wildfires in the north state, air quality officials are urging capital ...
When air quality is ranked "unhealthy for vulnerable groups" it means PM 2.5 are at levels that can cause problems for people ...
Wildfire smoke from Canada is forcing the Minnesota Pollution Control Agency to extend an air quality alert through Monday.