The Metro Vancouver regional district has issued an air quality advisory as hot, sunny weather mixes with emissions to create ground-level ozone, or smog.
The advisory spans Metro Vancouver and parts of the Fraser Valley.
It says the smog is expected to persist for a few days.
Officials are encouraging residents to limit unnecessary outdoor activities and check on those at higher risk of heat-related illness.
A major Quebec teachers union says it will follow the lead of the English Montreal School Board and seek to challenge the province's secularism law before the Supreme Court of Canada.
India has summoned Canada's envoy in New Delhi following a large Sikh rally in Toronto attended by all three major federal party leaders.
International students will be able to work off-campus for up to 24 hours per week starting in September, Immigration Minister Marc Miller announced Monday.
Prime Minister Justin Trudeau says his Liberal government will do everything it can to make sure most jobs linked to electric vehicle projects in Canada will stay locally.
British Columbia Premier David Eby and other politicians have denounced remarks at a demonstration in Vancouver where protesters chanted "long live Oct. 7," praising that day's attacks by Hamas on Israel.
Pro-Palestinian activists said on Monday they have no intention of dismantling their camp at Montreal's McGill University, as the school said it was discussing its next steps to deal with what it called an illegal encampment.