Understanding Heatstroke and Its Risks

What is Heatstroke?

Heatstroke and sunstroke are the same thing. They are serious and life-threatening conditions. When the body's cooling system fails, your core temperature exceeds 40°C. The term ‘sunstroke’ is used when the cause is specifically attributed to sun exposure.

Understanding the Terminology & Progression

Heatstroke: This is the severe stage where the body's temperature control system breaks down. The core temperature exceeds 40°C (104°F).

Sunstroke: Another name for heatstroke. It is used when direct sun exposure triggers the condition, but it is the same dangerous illness.

Heat Exhaustion: This is the precursor to heatstroke. The body is overheating but still trying to cool down. Symptoms include heavy sweating, a fast pulse, nausea, and cramps.

The Link: Heat exhaustion can progress to heatstroke if not treated. Recognising the early signs is crucial.

Symptoms like heavy sweating, cool, clammy skin, dizziness, nausea, headache, weakness, and cramps are typically associated with heat exhaustion. If untreated, this can lead to heatstroke. Heatstroke occurs when sweating stops and the brain is affected, requiring urgent treatment and care.

Early Signs of Dehydration & Heat-Related Illness

The early signs include heavy sweating, extreme thirst, weakness, dizziness, nausea, muscle cramps, headache, and faintness.

Action: Move to a cool place, rehydrate with water or sports drinks, and rest. If symptoms worsen or don’t improve, treat as heatstroke.

• Sweating heavily

• Raised body temperature

• Feeling dizzy or faint

• Tiredness and lethargy

• Reduced appetite

• Thirst

• Irritability

• Twitching or painful muscle cramps in the arms, legs, or abdomen

  
  

Signs of Heatstroke (Sunstroke)

• High body temperature (40°C or higher)

• Hot, red skin (can be dry or moist from exertion)

• No sweating (a key sign of severe heatstroke)

• Confusion, agitation, slurred speech, seizures, or coma

• Rapid, shallow breathing and a fast pulse

• Nausea, vomiting, headache, and dizziness

  
  

Recognising Heatstroke in Children

Temperature: Very high (over 40°C/104°F).

Mental Changes: Confusion, agitation, irritability, delirium, slurred speech, unusual behaviour, or loss of consciousness/coma.

Skin: Hot, red, and dry (no sweating), but can be sweaty if from strenuous activity.

Breathing/Heart: Rapid, shallow breathing and a fast, strong pulse (racing heart).

Other: Severe headache, nausea, vomiting, dizziness, or seizures.

What to Do in An Emergency

1. Call emergency services (000) immediately.

2. Move the person to a cooler, shaded spot.

3. Cool them down rapidly. Use wet cloths, spray with water, use fans, and apply ice packs (avoid placing ice directly on the skin).

4. Remove excess clothing.

5. Offer cool fluids (only if they are fully alert and can swallow).

   
   

Prevention Strategies

Everyone is at risk of heatstroke, but the risk is greater for children and the elderly. Here are some effective strategies to prevent heatstroke:

Stay Cool

• Seek Air Conditioning: Spend time in air-conditioned places like libraries or malls if your home is hot.

• Use Fans & Water: Fans help, and misting yourself with a spray bottle or taking cool showers/baths also cools you down.

• Block the Sun: Close curtains and blinds during the day; consider external awnings.

• Cool Down: Sit with your feet in cool water.

  
  

Hydrate & Dress Smart

• Drink Water: Drink water before you feel thirsty; avoid sugary drinks, alcohol, and caffeine.

• Light Clothing: Wear loose-fitting, light-colored clothes made of breathable fabrics like cotton or linen.

• Sun Protection: Use sunscreen, wear a wide-brimmed hat, and sunglasses when outside.

  
  

Adjust Your Schedule

• Avoid Peak Heat: Plan outdoor activities for early morning or late afternoon.

• Take Breaks: Rest in the shade and rehydrate frequently during outdoor activities.

• Acclimatise: Gradually increase your time outdoors to let your body adjust.

  
  

Be Aware

• Check on Others: Check on vulnerable family, friends, and neighbours.

• Medications: Be aware that some medicines can increase heat risk; talk to your doctor.

• Cars: Never leave children or pets in a parked car, even for a moment.

  
  

Conclusion

Heatstroke is a serious condition that can escalate quickly. By understanding the signs and taking preventive measures, we can protect ourselves and our loved ones. Remember to stay hydrated, seek shade, and be mindful of the heat, especially during the hottest parts of the day.

For more information on how to stay cool and safe during extreme heat, visit Stay Cool.