Raging wildfires in western Canada continue to send smoke into Colorado, prompting state health officials on Monday to issue another alert for poor air quality.
“Ozone and fine particulates levels have steadily increased and have now reached the Unhealthy for Sensitive Groups category,” the Colorado Department of Public Health and Environment announced Monday afternoon.
Elevated levels of both pollutants will be possible through Tuesday afternoon, the state agency said. The alert included a wide swath of Colorado’s Front Range, spanning Douglas County north into metro Denver and up through Larimer and Weld counties.
Expected visibility will remain poor into Tuesday. The alert recommended that sensitive people should consider reducing prolonged or heavy outdoor exertion.
Other Western states — such as Utah, Idaho and Montana — have issued their own air quality alerts as the smoke migrated across the Canadian border.
The fires have mostly been burning in the province of Alberta, where thousands of people have been evacuated.
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