Air quality is expected to get worse as smoke builds up with visibility being affected.
MPCA says the smoke is expected to completely exit the state by 9 a.m. on Tuesday.
While Metro Vancouver's air quality saw a brief reprieve on Friday, August 17th, the smoky haze returned the day after.
Environment Canada says elevated levels of fine particulate matter are expected to last for a few days yet.
"Wildfire smoke is a natural part of our environment but it is important to be mindful that exposure to smoke may affect your health".
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Air quality is forecast to be unhealthy around the region on Sunday and officials with the district warned that if the smell of smoke is present, Bay Area residents should stay inside if possible.
Thousands of BC firefighters are getting help from colleagues from other Canadian provinces as well as from fire crews from Mexico, Australia and New Zealand.
Benenati said yellow emojis can be concerning to people who have asthma.
More smoky, hazy air is expected to blanket much of Metro Vancouver and the Lower Mainland today as almost 600 wildfires continue to rage across British Columbia.
The north end of Vancouver Island is covered by the advisory as well.
Wildfire smoke originating in Canada is now clouding the skies over central and northeast Minnesota.