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Environment Canada issues heat warning

Environment and Climate Change Canada has issued a heat warning as a prolonged stretch of hot and humid weather begins today.

Daytime high temperatures in Muskoka and East Parry Sound are expected to range from 30 C to 37 C, while overnight lows will offer little relief, remaining between 20 C and 24 C. Humidex values are forecast to reach 38 to 45, making conditions feel significantly hotter.

The heat event is expected to continue through Wednesday evening or Thursday evening, depending on the region.

Tuesday is forecast to be the hottest day of the event, with temperatures approaching 37 C in parts of southwestern Ontario, the Greater Golden Horseshoe and eastern Ontario.

Environment Canada also warns that the combination of heat and humidity could lead to deteriorating air quality, with the Air Quality Health Index potentially reaching the high-risk category in some areas.

Residents are encouraged to stay hydrated, avoid strenuous outdoor activities during the hottest parts of the day, seek air-conditioned spaces when possible and check on vulnerable family members, friends and neighbours.

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