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Heat Warning in Effect
Toronto, ON — August 12, 2025
Toronto residents are in for a scorching day as humidex values are expected to push temperatures to feel like 40°C. Environment Canada has issued a heat warning for the city, urging people to take precautions against heat-related illnesses.
What to Expect
The actual air temperature will hover around 32°C, but the high humidity will make it feel much hotter. The intense heat will peak in the afternoon and early evening before temperatures begin to cool overnight.
Winds will remain light, offering little relief, and skies will be mostly sunny with the possibility of a few clouds later in the day. Overnight lows will remain warm, around 23°C, which means little cooling between days.
Health & Safety Tips
Health officials are reminding residents to take the following precautions:
- Stay hydrated by drinking plenty of water.
- Limit outdoor activities, especially during the hottest parts of the day.
- Seek shade or air-conditioned spaces when possible.
- Check on vulnerable individuals, including seniors, children, and those with chronic health conditions.
- Never leave people or pets inside parked vehicles.
Cooling Centres
The City of Toronto has opened cooling centres for residents who need relief from the heat. Locations and hours can be found on the city’s official website.
Looking Ahead
The hot and humid weather is expected to last until mid-week, with a slight cooldown predicted by Thursday. However, heat warnings could remain in place if conditions persist.
Bottom Line: Today will be one of the hottest days of the summer for Toronto. Take the heat seriously, stay cool, and protect yourself and your loved ones.
