US Edition'Heat dome' over Ontario and Quebec causing wild weather across much of Canada
- A heat dome over Ontario and Quebec caused extreme temperatures and severe weather across much of Canada during the weekend of June 21–22, 2025.
- The heat dome brought a high-pressure system with intense heat and moist air, raising temperatures above 30 C and humidex values near 40 to 45 degrees in the region.
- The weather system also induced colder-than-normal air and storms over the Prairies and West, caused flooding concerns in southern Alberta, and prompted evacuations in Ontario due to a storm that closed Highway 17.
- Environment Canada meteorologist Julien Pellerin said, "If there is a heat dome on a sector, colder air can be expected in another sector," and advised caution amid the hazardous conditions.
- Authorities issued heat warnings, urged schools to implement preventive measures including possible closures on June 23, and evacuated about 290 people from provincial parks due to storm risks.
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On Sunday, a warm and humid mass of air began to gradually cross Quebec from west to east. Meanwhile, Montrealers were already preparing to undergo the heat, while continuing to enjoy the summer.
·Montreal, Canada
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Extreme heat waves have resulted in more casualties than previously in the province in the last two summers, according to an INSPQ report.
·Montreal, Canada
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Coverage Details
Total News Sources33
Leaning Left9Leaning Right3Center4Last UpdatedBias Distribution56% Left
Bias Distribution
- 56% of the sources lean Left
56% Left
L 56%
C 25%
R 19%
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