The political body and service provider overseeing the Greater Vancouver regional district's 24 local authorities has issued an air quality advisory.
Metro Vancouver is warning people high amounts of ground-level pollutants are expected to persist for days.
The agency is asking people to avoid strenuous outdoor activities during mid-afternoon.
Infants, the elderly and those with lung conditions or heart disease are especially vulnerable.
The advisory is expected to remain until the weather changes.
Environment Canada says temperatures record-high temperatures are expected in the south coast of B.C. this weekend.Metro Vancouver issues air quality advisory for Lower Mainland region
