Source: Shutterstock

All About Heat Exhaustion

Last updated: Friday, November 30, 2018 | 2 min reading time

Dr Chan Ping Wah Kenneth

Respiratory Physician

Dr Kenneth Chan, respiratory physician, explains the signs of heat exhaustion and its health risks.

What is heat exhaustion and what causes it?

Heat exhaustion is a heat-related illness due to the body overheating. It is usually caused by over-exposure to exceptionally hot conditions, especially in the presence of high humidity and intense physical activity.

An individual suffering heat exhaustion may complain of nausea, dizziness and muscle cramps. He may appear to be profusely sweating and be mildly disorientated. His heartbeat may be very fast and he may have a weak pulse.

If you're feeling unwell, always consult a doctor for advice.

How common is heat exhaustion in Singapore?

Heat exhaustion, is thankfully, quite uncommon in Singapore. This is due to a relatively constant temperature and humidity year round. Hence, most Singaporean residents know how to take appropriate precautions. Individuals who are most at risk are those needing to perform heavy physical activity outdoors. These include construction workers, military personnel, and sportsmen and women.

Are the young or seniors more prone to heat injury? What dangers should they be aware of?

Yes, children below aged 4 and adults above age 65 are more prone. This is because their bodies do not handle heat as well as other healthy adults. In addition, they may not be independent enough to move to a cooler place or drink fluids to keep themselves hydrated.

Is it true that people who have experienced heat injuries are much more prone to heat injuries later on in life?

No, that is not true.

What are the potential consequences or dangers of heat exhaustion?

If left unchecked, heat exhaustion could lead to heat stroke. This is a life-threatening heat-related illness due to the body overheating. Seizures, brain injury, multiple organ failure and even death could ensue.

How do I know if I or someone else is experiencing heat exhaustion?

What should I do if I suspect I or someone around me is suffering from heat exhaustion?

Immediate treatment involves moving to a cool and shady place. Better yet, move the person into an indoor location which is air-conditioned. Drink plenty of fluids and remove any tight fitting or unnecessary clothing. Additional cooling measures which are helpful include fans, ice towels, cold shower or bath.

What else should I know about heat injuries?

Prevention is best. On a hot day, wear a hat and sunscreen (SPF30). Keep well-hydrated.

For sportsmen and women, it is recommended that they consume 250mL of fluid every 20 minutes, regardless if they feel thirsty. Before the physical activity, drink at least half a litre of fluids an hour before. If they feel unwell or have symptoms suggestive of heat exhaustion, they should discontinue that activity and consult a doctor for an appropriate treatment.

Article tags

Homecare Respiratory health

Take Charge, Take Action: Conduct Your Own Breast Examination

A monthly breast self-examination 7 – 10 days after your period starts can save your life.

Understanding and Preventing Tuberculosis

Tuberculosis, also known as TB, is an infectious disease that can be fatal if left untreated. Understand its dangers and how to treat it.

How to Help Someone Survive an Asthma Attack

Someone around you starts wheezing and coughing vigorously. What should you do?

What to Do During an Allergic Reaction

Learn how to tell if you have allergies and what to do if you experience an allergic reaction.

5 Misconceptions about Asthma and Exercise

Can asthma sufferers continue to exercise and lead active lifestyles?

How to Fight Off the Flu

What is influenza, and what flu vaccinations can you get to protect yourself against it?

Jump To