Heat rash and muscle cramps, to more dangerous hot weather emergencies like heat stroke and heat exhaustion.
Heat exhaustion and heat stroke:
Symptoms and treatment
Heat Exhaustion | Heat Stroke |
What is it? | |
Heat exhaustion occurs when the body loses an excessive amount of water and salt found in sweat. It can develop after exposure to high temperatures without enough fluid replacement. It can lead to heat stroke if it is left untreated. | Heat stroke occurs when the body's temperature rises rapidly (to 40°C/104°F or above) and the body is unable to cool down. It can cause death or permanent disability if emergency treatment is not provided. |
Symptoms | |
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Treatment | |
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Who is at risk?
Although extreme heat can affect everyone, some people are more at risk than others for heat-related illnesses, including:
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Tips to beat the heat
During extreme heat, the most important thing is to keep cool and avoid additional stress on your body.
Here are some important tips:
Here are some important tips:
Plan for the summer heat!
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Stay cool
Outdoors
- Schedule physical outdoor activities in the morning and evening hours when it is cooler
- Reduce activity and rest often in shady areas
- Choose lightweight, light-coloured, loose-fitting clothing
- Wear a wide-brimmed hat, sunglasses with UV protection and sunscreen with SPF 30 or higher
Indoors
- Stay indoors in cool, well-ventilated areas
- Use fans with caution, always keep a window or door open to bring in outside air
- Close blinds and drapes to reduce heat entering your home
- Take a cool shower or bath, or wet your hands, face and the back of your neck
- If the outdoor temperature is cooler at night, open windows to let the cool air in
- If you are not in an air-conditioned environment and unable to stay cool, go to a public building such as a library, community centre, shopping mall or public pool
Visit your local municipality's website for more information on where you can stay cool in your area:
York Region Heat Advisories
York Region issues a heat advisory when Environment Canada issues a humidex advisory for York-Durham. Environment Canada issues humidex advisories when the temperature is expected to reach or exceed 30°C and the humidex is expected to reach or exceed 40. The York Region extreme heat program runs annually from May 15th to September 30th.
Year | Date heat advisory issued | Number of days heat advisory was in effect |
2010 | July 5 August 4 August 30 | 4 1 4 |
2011 | May 31 June 8 July 20 | 1 1 2 |
Additional Resources
Extreme Heat Events - Health Canada
www.hc-sc.gc.ca/hl-vs/iyh-vsv/environ/heat-chaleur-eng.php
www.hc-sc.gc.ca/hl-vs/iyh-vsv/environ/heat-chaleur-eng.php
Climate Change & Health - Health Canada
www.hc-sc.gc.ca/ewh-semt/climat/index-eng.php
www.hc-sc.gc.ca/ewh-semt/climat/index-eng.php
Extreme Heat - York Region Emergency Management
www.york.ca/Services/Emergency+Management/What+to+do+if.../4.4.4.+Extreme+heat.htm
www.york.ca/Services/Emergency+Management/What+to+do+if.../4.4.4.+Extreme+heat.htm
Plant Trees, Build Shade; for Your Health and the Environment - York Region's Sun Sense Coalition
www.sunsafeyork.org
www.sunsafeyork.org
Heat Stress (Health and Safety Guidelines) - Ontario Ministry of Labour
www.labour.gov.on.ca/english/hs/pubs/gl_heat.php
www.labour.gov.on.ca/english/hs/pubs/gl_heat.php
For more information on this or other health-related topics, please call
York Region Health Connection at 1-800-361-5653, TTY 1-866-252-9933.