Environment Canada has issued an air quality alert for areas in central and northern Saskatchewan.
The weather office says northwest winds are spreading smoke from wildfires in northeast Alberta into portions of western Saskatchewan.
It warns smoke may produce poor air quality and reduced visibilities in some areas especially closer to the fire source and near the Alberta border.
Smoke near the ground is causing very high health risk conditions.
High levels of particulate matter may persist locally until the fire is extinguished or controlled.