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Alberta worker in a yellow hard hat drinking water on a hot summer day, heat haze visible
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Safety Programs 2020-07-29 3 min read

Working in Hot Conditions

Heat stress is a recognized workplace hazard under Alberta's OHS Act, and employers have a duty to protect workers when temperatures rise. Here is what the legislation requires and what a practical heat illness prevention plan looks like.

When the summer months come along, so do the heat advisories. Temperature extremes can become dangerous to your health. When working in conditions with excessive exposure to heat, heat illnesses are a concern since heat stroke is a possibility. Heat stroke can become lift threatening if not treated immediately. When I was researching for this blog, I didn’t know the different symptoms and treatments for each type of heat illness. I suggest that everyone know and understand the different symptoms and treatments that go along with each heat illness, since it could save a life.

Determining hot working conditions depends on a number of factors such air temperature, humidity, presence of hot objects in the area, air movement, physical exertion work environment and the clothing worn. Once the conditions have been addressed and evaluated, control measures can be put in place to protect the yourself and others.

You can be challenged in a number of ways when exposed to temperature extremes. Air temperature, air movement, and humidity are all factors that need to be considered when determining protective clothing and exposure levels for the physical activity.

Recognize the signs of heat stroke and other related heat illnesses. Being aware of the signs and symptoms related to a heat illness can help keep you and the lives of others safe.

Heat Illness

Symptoms

Treatment

Heat Stroke

  • Confusion, altered mental state, slurred speech
  • Loss of consciousness
  • Hot, dry skin
  • Seizures
  • Very high body temperature
  • Call 911
  • Move the person to a shaded, cool area
  • Remove any unnecessary clothing
  • Cool the person quickly with a cold water or ice bath

Heat Exhaustion

  • Headache
  • Dizziness, nausea
  • Weakness
  • Heavy sweating
  • Elevated body temperature
  • Move person to shaded area
  • Give the person a cool water to drink

Heat Cramps

  • Muscle cramps in the legs, arms or abdomen
  • Drink water as well as electrolyte replacement
  • Rest for at least 1 hour and seek medical attention if cramps have not subsided

Heat Rash

  • Red clusters that look like small blisters
  • Move to a cooler environment
  • Keep rash area dry

Hot Conditions

Some ways to help prevent a heat illness during these summer months include:

  • Employers must assess heat hazards and implement appropriate controls such as ventilation, air movement, or administrative measures to protect workers from heat exposure.
  • Employers must assess all relevant factors such as temperature, humidity, workload, and clothing to determine when controls and precautions are necessary to protect workers from heat-related hazards.
  • Workers should stay hydrated by drinking water or other fluids regularly while working in hot conditions. Employers should provide access to potable water.
  • You need to protect yourself from over exposure from the sun as well as insects. Wear work and weather appropriate clothing. Clothing should be layered and light in weight and color and should be loose fitting to speed up evaporation. Fabric should be of a type that allows perspiration to evaporate easily.
  • If you are working outdoors, ensure to wear sunglasses or tinted safety glasses if permitted and use sunscreen of appropriate sun protection factor. Wear insect repellent to protect against insect bites.
  • Ensure to take frequent rest breaks in a shaded or cooled area. Employers must train workers to recognize symptoms of heat-related illness and have procedures in place for reporting and responding to such incidents.

Frequently Asked Questions

Symptoms of heat stroke include confusion, altered mental state, slurred speech, loss of consciousness, hot dry skin, seizures, and a very high body temperature.

Alberta employers must provide heat stress training, monitor workers for symptoms, regulate workplace temperature with fans or air conditioning, provide shaded rest areas and drinking water, and enforce appropriate clothing and sun protection.

Move the worker to a shaded area, remove excess clothing, apply cool water or ice packs, provide cool water to drink, and seek medical help if symptoms worsen or do not improve.

Employers should consider fractional safety leadership or OHS consulting services to develop heat stress programs, support COR audits, manage WCB claims, and ensure compliance with Alberta OHS heat illness requirements.

Written by

Safety Ahead Team

Alberta-based safety consultants with decades of field experience — COR auditors, OHS advisors, and WCB specialists working with employers across the province.

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In this article

  • Heat Illness
  • Heat Stroke
  • Heat Exhaustion
  • Heat Cramps
  • Heat Rash
  • Hot Conditions
  • Frequently Asked Questions

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Is your safety program actually working in the field?

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