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HomeCourse CategoriesOccupational Health and Safety06: Heat Stress in the Workplace

OHS~ 06 - Heat Stress in the Workplace

Duration: ± 4hours | Course Code: OHS~ 06 | Cost From: R 450 ($ 20) per person

Pic Man 1Heat Stress includes a variety of different conditions that occur when the body is subjected to excessive heating, and eventually stressed due to over-heating.

Humans perspire or sweat when they get hot. This sweating is the process the body uses to cool itself down, by releasing water through the skin.
In order to effectively perspire or sweat, the body needs excess water to sweat out, and if it “runs dry”, so to speak, it becomes stressed. Just like a radiator in a car keeps the engine cool, if it runs out of water, the engine heats up very rapidly and then seizes.

Human bodies are the same – if we cannot maintain a regular perspiration process to keep the body cool and functioning correctly, the body quickly over-heats and becomes stressed. We know when we are thirsty, out mouths get dry – the body tells us it needs water. However, as with perspiration, the body water is used up faster than we know, and generally in hot conditions, and exterting ourselves under high temperatures, by the time we realize we are thirsty, it can be too late. By the time we drink and the water gets absorbed into the different body organs that are becoming de-hydrated, the body is already going into stress.

The degree of over-heating causes different types of Heat Stress. If you are going to be located or working, doing physical exercise or operating in a close, airless, heated or high humidity area then the fitter you are, and the better physical condition you are in, the less likelihood there is of developing Heat Stress.

NOTE: This module is not intended to give you specific Medical Knowledge. It is an Awareness Module through which certain symptoms can be better understood, and working conditions properly managed, to ensure Heat Stress does not become a major safety factor. It is not intended to replace the need for expert diagnosis and Medical Attention when someone if feeling unwell.

In all cases, when feeling ill, go and see a Medical Doctor.

This module consists of a PowerPoint Presentation which should take approx ±40 minutes to read through carefully, Module Guide and Learner's Notes and 2 Assignments and a short Quiz at the end for completion.


  • To be fully aware of and able to understand the necessity to take special care when working in high temperature and high humidity environments
  • To understand the different levels of Heat Stress and their symptoms
  • To manage the workplace to minimize the impact of Heat Stress

Target Audience

All employees and individuals who will be working and operating in high temperature and high humidity areas, confined spaces and other environments where Heat Stress can play a major role.

Supervisors, Safety Officers, Team Leaders and management personnel

Learning Outcomes

On completion of the course, to have a good knowledge and understanding of:

  • What is meant by Heat Stress and the different types or levels of Heat Stress
  • The various causes of Heat Stress
  • The methods to be taken to prevent Heat Stress
  • The different symptoms of Heat Stress and actions to be taken when heat stress occurs

Scope & Requirements

  1. Learners must be able to communicate (read and speak) without difficulty in the English language
  2. Learners must be willing and able to understand and recognize different situations where Heat Stress may occur.
  3. Learners must be willing and able to manage their tasks, jobs and work to minimize Heat Stress of themselves and their co-workers


R 450 per person
$ 20 per person for international students
Group discounts available on request


All Material is subject to Copyright. A Certificate of Completion will be sent to those who complete the course.

This is NOT a medical course, and not designed to substitute for medical care and opinion

Duration: ± 4hours
Course Code: OHS~ 06

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About Comet Training

Comet Training is a trading name for The Penny Ferry (Pty) Ltd, a limited liability company established in 1996. The Penny Ferry has been involved in hands-on training and e-learning for many years, specializing in the Marine, Environmental, Tourism, Industrial, Health and Technical markets. Through close associations with other organizations, Comet Training was established to better promote a suite of e-learning applications to the global markets.