Environment Canada says smoke from forest fires that arrived Saturday afternoon could now linger until early Monday morning.

The air quality is expected to improve Thursday morning into Thursday afternoon, according to the weather agency.

Ottawa and much of south and southeastern Ontario can expect poor air quality this weekend as wildfire smoke returns, ...

Ottawa and the wider area will be experiencing poor air quality due to smoke from forest fires this weekend, Environment ...

Wildfire smoke from northern Saskatchewan and Manitoba is riding the jet stream directly toward the Great Lakes region, lowering air quality across much of Ontario.

Environment Canada confirmed the expected arrival of wildfire smoke starting later Saturday and through Sunday ...

Air quality remains poor in parts of Canada as wildfire smoke travels along the jet stream — with Europe now in its path.

Wildfire smoke from the Prairies prompted special air quality statements and warnings across the country Saturday.

A number of factors are now contributing to a "tipping point" on climate change and Canada's forests that the expert said ...