Relief from sweltering conditions expected in parts of Canada after record-breaking heat

By Canadian Press on August 12, 2025.

Sweltering heat is expected to break in the coming days for many Canadians after Monday’s scorching temperatures broke dozens of daily heat records across the country.

A multi-day heat wave is expected to end in southern British Columbia on Tuesday.

Monday’s temperatures broke or tied daily heat records in nine regions in the province, according to Environment Canada, six of which were located on Vancouver Island and stretching as far north as Pemberton on the mainland.

Hot conditions are expected to continue through Wednesday southern Ontario, stretching north past Lake Huron and Georgian Bay and east through southern Quebec.

The national weather agency said cooler temperatures are expected to sweep through the area by Tuesday evening, providing relief from the 30 C temperatures and near 40 humidex values.

In the Maritimes, similar temperatures are expected to remain through to Wednesday, while parts of Newfoundland will see similar conditions breaking on Thursday or Friday.

Monday’s temperatures also shattered dozens of daily heat records across the Atlantic provinces, with some areas even setting new monthly extreme temperature records for August, including the Newfoundland and Labrador regions of La Scie, Goose Bay and Mary’s Harbour.

An Agriculture Canada update shows Nova Scotia, eastern Newfoundland, southeastern New Brunswick and portions of Prince Edward Island shifting into moderate and severe drought conditions over the past month, with rainfall levels plummeting to 60 per cent of normal levels in Halifax.

Environment Canada advises people to limit the amount of time they spend outdoors and to monitor for signs of heat exhaustion in these conditions.

— With files from Vanessa Tiberio in Toronto and Michael Tutton in Halifax.

This report by The Canadian Press was first published Aug. 12, 2025.

Natasha Baldin, The Canadian Press

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