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The heat event will begin Saturday, Aug. 9 and is forecast to continue past Tuesday for portions of southern Ontario, including York Region.
Extreme heat is on the way with daytime highs of 30–33°C and humidex values reaching 35–40. Overnight lows will stay warm at 19–23°C. Cooler temps expected mid-next week.
Stay Safe in the Heat:
- Drink water often—don’t wait until you’re thirsty
- Check on older adults, those living alone, and vulnerable individuals
- Watch for signs of heat exhaustion: headache, nausea, dizziness, dark urine, fatigue
- Heat stroke is an emergency—call 911 if symptoms appear (red/hot skin, confusion, loss of consciousness)
- Use fans, AC, or visit Cool Spaces, libraries, or shaded parks
- Close blinds and open windows if cooler outside
- Schedule outdoor activities during cooler hours
- Wear light-coloured, loose-fitting clothes and a wide-brimmed hat
- Never leave children or pets in parked vehicles.
Follow your local public health authority for updates.
Get relief from the heat: find a list of King Township Cool Spaces here or use the York Region Cool Spaces Map to find a location near you. Learn more at york.ca/ExtremeHeat.