Hazards in Manitoba

Extreme Heat


Understanding extreme heat

Extreme heat events are serious. Especially as our climate changes. In 2021, Manitoba faced a record-breaking heat wave caused by a "heat dome." This is a high-pressure system that turns an area into a pressure cooker! Heat waves occur when weather conditions combine to raise the temperature and humidity for many days.


Risk awareness:

  • Maintain awareness by monitoring information shared by your local authority.
  • Stay informed about weather conditions by monitoring local news and weather forecasts.

Planning and education:

  • Consider adding the following items to your Emergency Go Kits and/or Home Emergency Supplies: electrolyte drinks, a portable or hand-held fan, cooling towels or bandanas that can be soaked in cool water, and cooling sprays or gels.
  • Develop and practice your family emergency plan.

Heat-Related Illnesses:

  • There is no universal definition about what is "too hot;" It depends on personal and cultural factors, such as familiarity, age, health, and activity level.
  • Your body will try to maintain a steady temperature. However, too much heat can cause irregularities.
  • Symptoms can range from mild (heat exhaustion) to severe (heat stroke).

If you are exposed to heat for too long, watch for these signs:

Symptoms:

  • Headache, nausea, dizziness, weakness, confusion, and increased body temperature.
  • Dehydration, swelling, and rapid breathing.
  • Muscle cramps and pale skin.

Heat stroke is serious. Seek medical attention immediately if you experience these symptoms combined with confusion and/or loss of consciousness.

Property protection strategies:

  • Insulate your home. This helps regulate indoor temperatures.
  • Consider a reflective or green roof to reduce heat absorption.
  • If possible, convert paved areas to vegetation. Green spaces absorb less heat than paved surfaces.

Review the Natural Disaster Preparation Residential Checklist for more tips on how to protect your home.



Canada's Record High Temperature

In 2021, Lytton, B.C. faced an unprecedented heatwave, shattering records by reaching 49.6°C! This alarming increase highlighted the growing intensity of heatwaves in recent years. It also contributed to growing concerns about climate change and its impacts.


Stay Informed:

  • Listen to local radio, television, or other official news sources.
  • Pay close attention to updates and warnings.

Health and Safety:

  • Follow instructions from your local authority.
  • Drink plenty of water to stay hydrated.
  • Plan outdoor activities for cooler hours.
  • Find shade. Wear light-colored, breathable clothing, and apply sunscreen.
  • Stay in air-conditioned rooms or visit cooling centers in your community.
  • Take cool showers, baths, or swims to cool off.

Precautions for Livestock and Pets:

  • Ensure the safety of your pets and any livestock by making sure they have shade and plenty of water.
  • Never leave pets in hot cars. Temperatures can quickly become lethal.


Cost of Extreme Heat

In 2021, Canada anticipated annual costs ranging between $3 billion and $3.9 billion due to problems associated with extreme heat. As temperatures rise, sectors lacking adequate cooling options, especially in the face of climate change, will experience economic challenges.


If you are suffering from heat exhaustion:

  • Find shade or a cooler place to avoid further exposure to heat.
  • Drink water to stay hydrated.
  • Rest and lie down to recover.
  • Use a damp cloth with cool water to reduce body temperature.

If you are suffering from heat stroke:

  • Call 911, it is an emergency.
  • Move to a shaded or air-conditioned area to cool down.
  • Splash cold water on the body, especially large areas.
  • Increase air circulation with a fan, if available.
  • Remove excess clothing to improve heat dissipation.
  • Unlike heat exhaustion, people with heat stroke should not drink fluids.


Additional Resources


Contact information

  • Environmental Health
    Phone: (204) 788 6735