Canadian wildfire smoke is causing air quality warnings in the western United States, affecting multiple states including Montana, Colorado, Idaho, and Utah.
State of play: Smoke from Canadian wildfires in Alberta has drifted into the northwestern United States, prompting air quality alerts.
* Montana issued an air quality alert for more than three dozen counties, with some experiencing “very unhealthy” air quality levels.
* Eastern Colorado, including Denver and Colorado Springs, faced unhealthy air quality levels at points on Sunday.
* Utah and Idaho also started seeing wildfire smoke on Friday and issued warnings for vulnerable residents.
Looking ahead: A Pacific cold front is expected to bring rain and wind, which could help disperse the smoke.
* The air quality is predicted to improve, but some health impacts on residents, particularly those at higher risk, are still possible through Sunday afternoon.
By the numbers: Canadian fire officials said that wildfires this year have burned over two million acres in Alberta alone.
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