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Canada Braces for Above-Average Summer Heat and Elevated Fire Risks

Climate-driven warming has pushed Canadian summers nearly two degrees hotter since the 1940s, setting the stage for above-normal heat with heightened fire and drought hazards.

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Rustee Tosh and her three-year-old daughter Ellie Tosh play at Weaver Park on a hot sunny afternoon. According to new seasonal forecasts from Environment Canada and Weather Network, a warm, dry summer is expected in much of Saskatchewan. Photo taken in Saskatoon, Sask. on Wednesday, May 28, 2025. (Michelle Berg / Saskatoon StarPhoenix)
A heat wave has hit the city as people enjoy the day at Bowness Park in Calgary on Wednesday, May 28, 2025.
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Overview

  • The Weather Network’s May 28 forecast calls for widespread above-seasonal temperatures across Canada from June through August.
  • Southern and eastern Ontario will see warm, humid conditions that fuel frequent showers, muggy nights and a higher chance of thunderstorms.
  • Northern Ontario and British Columbia’s interior are forecast to be hot and dry, raising concerns over wildfires and smoke-related air quality issues.
  • Below-normal precipitation combined with well above-average heat in the southern Prairies creates serious drought risks for crops and water supplies.
  • A near-normal Atlantic hurricane season could bring tropical storms or remnants into the northeastern U.S. and Atlantic Canada, adding to regional weather threats.