Metro Vancouver has ended the fine particulate matter air quality advisory that has been in effect since Sept. 8, saying clean marine air is now flowing through the region.
Environment Canada says air quality in southern and central British Columbia is expected to improve through the weekend as a new weather system moves in, but conditions across the mountains were expected to worsen before getting better.
Smoke from wildfires burning in California, Oregon and Washington state has blanketed B.C., prompting respiratory health warnings on Saturday that extended into southern Alberta and as far east as Saskatchewan.
Environment Canada said smoke was beginning to clear across the western half of Vancouver Island, and there should be widespread improvements farther east by Sunday.
In the central portions of the province, the agency said smoke will be visible at higher elevations with potential for light to moderate effects.
A fine particulate advisory remains