With hot and humid weather expected across Ontario, residents are encouraged to take extra precautions to stay safe during periods of extreme heat. Heat-related illnesses can develop quickly, especially for older adults, infants and young children, pregnant individuals, people with chronic health conditions, those who work or exercise outdoors, and anyone without access to air conditioning.

Tips to Stay Cool

💧 Drink plenty of water, even if you don’t feel thirsty.
🏠 Stay in air-conditioned buildings or cool, shaded areas whenever possible.
👕 Wear lightweight, loose-fitting, light-coloured clothing.
☀️ Limit outdoor activities during the hottest part of the day.
🧴 Wear sunscreen, a wide-brimmed hat, and sunglasses when outdoors.
🚗 Never leave children, older adults, or pets unattended in a parked vehicle.
👥 Check in on neighbours, friends, and family members who may be more vulnerable to the heat.

Know the Signs of Heat-Related Illness

Watch for symptoms such as:

  • Heavy sweating
  • Dizziness or fainting
  • Headache
  • Nausea or vomiting
  • Muscle cramps
  • Confusion or loss of consciousness

If someone is experiencing signs of heat stroke, call 911 immediately. Move them to a cool place, loosen clothing, and cool them with water or cool cloths while waiting for emergency assistance.

Stay Informed

Environment and Climate Change Canada’s latest outlook indicates continued heat and the potential for thunderstorms in parts of Ontario over the coming days. Weather conditions can change quickly, so be sure to monitor local forecasts and alerts before heading outdoors.

Helpful Resources

For current weather information and heat safety resources, visit:

Stay safe, stay hydrated, and look out for one another during periods of extreme heat.

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