A woman reads in the St. Lawrence River in the Verdun borough of Montreal on Wednesday, July 16, 2025. THE CANADIAN PRESS/Christinne Muschi
Environment Canada warns of high heat and humidity for southern Quebec and Ontario
Jun 29, 2026 | 9:06 AM
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MONTREAL — Environment Canada is warning about an extended period of hot and humid weather forecast for southern Quebec and Ontario this week.
The agency has issued yellow heat warnings for Sarnia, Windsor and several other Ontario communities at risk of extreme heat beginning today.
Some regions could see temperatures of up to 36 C as well as humidex values that could reach the 40s.
The heat is expected to move into Montreal and other parts of Quebec on Wednesday and is forecast to last until Saturday.
