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Atlantic Canada sees more sweltering temperatures, relief expected in Ontario

Cooler air will bring relief from temperatures near 30 C and humidex values close to 40 as the heat wave ends in southern British Columbia, Environment Canada said.

  • On Monday, numerous temperature records were broken throughout Atlantic Canada, including Miramichi, N.B., reaching 37.6 C, and La Scie, N.L., achieving a new August high of 31.5 C.
  • An atmospheric upper ridge formed over the east coast trapped heat and blocked rain, causing prolonged hot, dry weather and elevated wildfire risk, according to Climenhaga.
  • High temperatures are expected to persist in the Maritimes through Wednesday, while southern Ontario and Quebec will remain hot but cooler air will sweep in by Tuesday evening.
  • Environment Canada advises limiting outdoor time, drinking water, and watching for early heat exhaustion signs, while heat warnings will end Wednesday as temperatures fall toward seasonal averages.
  • Extreme heat’s continuation stresses wildfire and drought concerns, suggesting relief depends on sustained rainfall rather than brief showers to reduce risks and volatility quickly.
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17 Articles

Winnipeg Free PressWinnipeg Free Press
+13 Reposted by 13 other sources
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Atlantic Canada sees more sweltering temperatures, relief expected in Ontario

Breaking News, Sports, Manitoba, Canada

·Winnipeg, Canada
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National Observer broke the news in Canada on Tuesday, August 12, 2025.
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