When your body’s cooling system can’t keep up with the heat, you dehydrate and your temperature rises above 38°C. That is when you can get heat related illnesses such as:

  • Heat rash
  • Heat cramps (sweating has caused salt loss)
  • Heat exhaustion
  • Heat stroke (very serious – you can die!)

Let’s take a look at two serious heat illnesses; heat exhaustion and heat stroke.


Heat exhaustion is when your body cannot keep blood flowing both to vital organs and to the skin for cooling.


  • Weakness, feeling faint
  • Headache
  • Breathlessness
  • Nausea or vomiting
  • Difficulty continuing work.


Get medical aid and cool down (move to a shaded area, loosen clothing, drink cool water). It takes 30 minutes at least to cool the body down from heat exhaustion, and if it’s not treated promptly, it can lead to heat stroke.


Heat stroke is a medical emergency. You can die from it. Your body has used up all its water and salt and cannot cool itself. Your temperature rises to dangerous levels.


  • Confusion and irrational behaviour
  • Convulsions
  • Unconsciousness
  • No sweating – hot, dry skin
  • High body temperature – 40°C or more


If a co-worker shows symptoms of heat stroke, you should act fast.

  • Call the local emergency number or get them worker to a hospital
  • Take aggressive steps to cool the worker down (move to First Aid room and put fan on the person to help cool down)
  • If the worker is unconscious, don’t give them anything to drink

Here’s how to avoid heat stress in the first place:

  • Wear light, loose clothing that allows sweat to evaporate. Light coloured garments absorb less heat from the sun.
  • Drink small amounts of water (8oz) every half hour. Don’t wait until you are thirsty.
  • Avoid coffee, tea, beer or other drinks that make you go to the bathroom frequently.
  • Avoid eating hot, heavy meals that increase your body temperature.
  • Remember that your physical condition can reduce your ability to deal with the heat. Age, weight, fitness, health conditions (heart disease or high blood pressure), recent illness, or medications can all affect your ability to withstand high temperatures.

July 1 - 2019