People visit the Mount Royal lookout in Montreal on Monday, July 14, 2025. THE CANADIAN PRESS/Christinne MuschiChristinne Muschi/The Canadian Press
Smoke from wildfires in the Canadian Prairies has led to air quality warnings across southern Quebec.
Swiss company IQAir this morning ranked Montreal as having the worst air quality in the world.
Environment Canada has issued warnings that recommend limiting time spent outdoors.
It says people with existing health conditions, seniors, pregnant women, infants and young children should avoid strenuous outdoor activities this weekend.
Wildfire concern differs widely across Canada, poll shows
Heat warnings are also in effect in southern Quebec for Sunday, Monday and Tuesday.
Temperatures are expected to top 30 C during the day and remain above 20 C at night.
Dozens of wildfires continue to burn in Saskatchewan and Manitoba, many considered out of control.
Earlier this month, heavy smoke and thick fumes triggered air-quality alerts in vast swaths of the country, as some areas in Western and Central Canada are experiencing one of the most destructive wildfire seasons in recent decades.
Several provinces have faced a more severe and earlier start to the wildfire season than previous years, while researchers from Environment Canada have said that dryness, lower precipitation and warmer temperatures are anticipated to create ripe conditions for more fires later this summer.