Heat stress refers to the strain placed on an individual when the body’s mechanisms for regulating internal temperature are overwhelmed by excessive heat. This can result from a combination of factors including environmental conditions (such as high air temperature, humidity, air movement, and radiant heat), the physical activity of the person (which generates metabolic heat), and sometimes the type of clothing worn.
In workplaces, heat stress can occur in various industries such as foundries, steel mills, construction sites, agriculture, kitchens, and more. The risk increases when individuals are exposed to high temperatures over prolonged periods, leading to potential health issues ranging from discomfort and reduced performance to more serious conditions like heat exhaustion or heat stroke.
Management of heat stress typically involves engineering controls (such as ventilation and air conditioning), administrative controls (such as work-rest schedules and hydration protocols), and the use of personal protective equipment or clothing designed to mitigate heat exposure. Recognizing the signs of heat stress and promptly addressing them are crucial to preventing serious health consequences among workers exposed to high temperatures.
In Manitoba, the Workplace Safety and Health Regulation Part 4.12 on Thermal Stress, mandates that employers adhere to certain requirements to protect workers from the effects of thermal stress. Here are the key obligations for employers:
- implement safe work procedures and control measures based on the threshold limit values for thermal stress established by the American Council of Governmental Industrial Hygienists (ACGIH); and
- provide workers with information, instruction and training in the symptoms of thermal stress and the precautions to be taken to avoid injury from thermal stress.
In the Canada Labour Code, Thermal Stress is addressed under subsection 10.19 of Part X (Hazardous Substances) in the Canadian Occupational Health and Safety Regulations. These regulations under Part X of the Canada Labour Code aim to protect the health and safety of federal workers by addressing the risks associated with thermal stress in various work environments.
By following these regulations and measures, employers can help prevent heat-related and cold-related illnesses and injuries among their workforces.
SAFE Work Manitoba developed the Guideline for Thermal Stress, which help workplace develops and implements a thermal stress management program in your workplace to protect workers in both hot and cold environments.
If you are a worker and need guidance on health and safety matters that are specific to your work environment, always reach out to your health and safety committee. They are knowledgeable about the specific hazards and protocols relevant to your workplace, and can provide you with the necessary information and guidance to ensure your safety and well-being while on the job. Always prioritize safety and don’t hesitate to seek clarification or assistance when needed!
As temperatures soar during the summer months, managing heat stress becomes crucial for both productivity at work and well-being at home. Heat stress occurs when the body’s ability to cool itself is overwhelmed by excessive heat and humidity, leading to various health issues ranging from mild discomfort to severe conditions like heat exhaustion or heat stroke. Here’s how you can effectively manage heat stress whether you are at work or home:
At Work:
- Stay Hydrated: Drink plenty of water throughout the day, even if you don’t feel thirsty. Avoid excessive amounts of caffeine or alcohol, as they can contribute to dehydration.
- Take Breaks: If possible, schedule outdoor work during cooler parts of the day (early morning or late afternoon). Take frequent breaks in shaded or air-conditioned areas to cool down.
- Dress Appropriately: Wear lightweight, loose-fitting clothing that allows your body to breathe. Light-colored clothing reflects sunlight and helps keep you cooler.
- Use Cooling Aids: If available, use cooling fans, misting fans, or personal cooling products like cooling towels or vests to lower body temperature.
- Know the Signs: Educate yourself and coworkers about the signs of heat-related illnesses such as heat cramps, heat exhaustion (heavy sweating, weakness, dizziness), and heat stroke (high body temperature, confusion, loss of consciousness). Act quickly if someone shows symptoms.
- Modify Work Practices: Adjust workloads and pace to account for hot conditions. Encourage teamwork to share tasks and reduce individual strain.
At Home:
- Air Conditioning and Fans: Use air conditioning to maintain a comfortable indoor temperature. If AC isn’t available, use fans and open windows to promote air circulation.
- Stay Indoors During Peak Heat: Minimize outdoor activities during the hottest part of the day (typically between 10 AM and 4 PM). Plan outdoor activities for cooler times if possible.
- Hydrate Regularly: Keep a water bottle handy and encourage family members to drink fluids regularly. Fresh fruits and vegetables with high water content can also help maintain hydration.
- Create Shade: Utilize shades, blinds, or curtains to block direct sunlight from entering your home. Consider installing awnings or planting trees for long-term shade solutions.
- Cooling Techniques: Take cool showers or baths or use damp towels to cool down. Freeze damp washcloths or water bottles to use as makeshift ice packs.
- Check on Vulnerable Individuals: Keep an eye on elderly family members, young children, and pets who are more susceptible to heat-related illnesses. Ensure they are staying cool and hydrated.
Please also check the Extreme Summer Weather Community Response Plan to keep Winnipeggers safe this Summer!
The Heat Stress Toolkit developed by Occupational Health Clinics for Ontario Workers (OHCOW) in partnership with Centre for Research in Occupational Safety and Health (CROSH) represents a comprehensive resource aimed at supporting and safeguarding workers exposed to heat in various industries. It includes an updated Heat Stress Awareness Guide, a new Prevention guide, as well as new Physiological Monitoring Guide. It also includes several posters and infographics, videos, and an updated, online Heat Stress Calculator. An extensive list of additional resources is also provided for your reference.
Thank you to André Gauvin, Occupational Hygienist from Occupational Health Clinics for Ontario Workers Inc. (OHCOW) for the online presentation this month on OHCOW’s new Heat Stress Toolkit. Protect yourself and workers at your workplace with the information and resources provided in the toolkit!
By taking proactive measures to manage heat stress both at work and home, you can stay cool, healthy, and productive throughout the summer months. Remember, prevention is key to enjoying the season safely.