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TORONTO, June 30, 2026 – Croatia and Portugal fans and players will not be thrilled to learn that Environment Canada has issued an Orange Heat Warning for the City of Toronto as a prolonged stretch of dangerous heat settles over the region today and will continue through Thursday. Temperatures are expected to climb into the low to mid-30s through Friday, with some areas potentially reaching 37°C and warm overnight temperatures providing little relief.
The hottest weather is expected on Wednesday and Thursday, when daytime highs of 34°C to 37°C are forecast. Overnight lows between 21°C and 25°C will make it difficult for homes without air conditioning to cool down.
The heat is expected to continue to remain above 30°C until Saturday.
Environment Canada also warns that the prolonged heat and humidity could lead to deteriorating air quality, with the Air Quality Health Index approaching the high-risk category.
Canada’s trusted weather agency says extreme heat can affect anyone, but older adults, infants and young children, people with chronic health conditions, outdoor workers and those without access to air conditioning are at greater risk of heat-related illness.
Residents are encouraged to drink plenty of water throughout the day, avoid strenuous outdoor activities during the hottest hours, and spend time in air-conditioned buildings whenever possible. It’s also important to check in regularly on older neighbours, friends and family members, especially those living alone.
Make sure you are hydrated, especially if you are headed to the big round of 16 match between Croatia and Portugal at Toronto Stadium at 7 tomorrow or even to a watch party. And it is not just important for soccer fans and players. Carry a water bottle wherever you go around the city on Wednesday and Thursday.
Know the Signs of Heat Exhaustion
Early signs of heat exhaustion include headache, dizziness, nausea, excessive thirst, dark urine and unusual fatigue. Anyone experiencing these symptoms should move to a cooler place, rest and drink water.
Heat stroke is a medical emergency. Symptoms can include hot, flushed skin, confusion, dizziness, nausea or loss of consciousness. Anyone showing signs of heat stroke should receive immediate medical attention by calling 911 while efforts are made to cool them with shade, cool water or ice packs.
To stay safe during the heat event, Environment Canada recommends:
- Drink water often, even before you feel thirsty.
- Keep blinds or curtains closed during the hottest part of the day.
- Use air conditioning or fans where available, or visit a cooling centre, community centre, library or other air-conditioned public space.
- Plan outdoor activities for the early morning or evening when temperatures are lower.
- Wear lightweight, loose-fitting, light-coloured clothing and a wide-brimmed hat.
- Never leave children, older adults or pets unattended inside a parked vehicle.
The Heat Warning is expected to remain in effect through Friday and could continue into the weekend if the hot air mass lingers over southern Ontario. Residents are encouraged to monitor the latest forecasts and weather alerts as conditions evolve.
