MONTRÉAL — Environment Canada has issued air quality warnings across southern Quebec due to smoke from wildfires in the Canadian Prairies.

IQAir, a Swiss air quality technology company, on Saturday morning ranked Montreal as the city with the worst air quality in the world. By early afternoon, it had dropped to second place behind Kinshasa, the capital of the Democratic Republic of the Congo.

People should limit their time outdoors and reschedule sports and other outdoor events, Environment Canada says.

"During heavy smoke conditions, everyone’s health is at risk regardless of their age or health status," the weather agency said in an air quality warning issued Saturday.

Air quality in Quebec is expected to improve Saturday evening and reach more normal levels on Sunday. The smoke will

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