Key Takeaways – Heat Stroke in Australia
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Heat stroke is a life-threatening heat-related illness with a core body temperature over 40°C and neurological symptoms like confusion or unconsciousness.
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In Australia, cases can occur rapidly during heatwaves, bushwalks, outdoor work, or inside parked cars.
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Between July 2012–June 2022, 9,119 hospitalisations and 677 deaths were linked to extreme heat (AIHW data).
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Common symptoms include hot, dry skin, rapid heartbeat, nausea, headache, confusion, seizures, and loss of consciousness.
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High-risk groups include children, older adults, outdoor workers, athletes, and those on certain medications.
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Heat stroke vs heat exhaustion: exhaustion involves heavy sweating and milder symptoms; heat stroke is a medical emergency—call 000 immediately.
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First aid steps: move to a cool area, remove excess clothing, apply wet towels or ice packs, fan the body, and use cool water immersion if available.
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Call 000 if temperature exceeds 40°C, the person is unconscious, has seizures, or stops sweating/breathing normally.
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Prevention tips: stay hydrated, avoid peak sun hours (10 AM–4 PM), wear light clothing, and never leave people in parked cars.
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Enrol in a Provide First Aid (HLTAID011) course to be prepared for emergencies like heat stroke.
Heat stroke is a severe form of heat-related illness where the body’s temperature regulation system fails. It’s defined by a core body temperature above 40°C, accompanied by neurological dysfunction like confusion, disorientation, or unconsciousness.
In Australia, heat stroke can happen rapidly during bushwalks, construction work, or even while waiting in a parked car. Heatwaves in cities like Adelaide, Perth, and Sydney pose growing risks as climate change intensifies.
According to the Australian Institute of Health and Welfare (AIHW), in the period July 2012 to June 2022, approximately 9,119 hospitalisations were attributed to extreme heat across Australia. In the overlapping period, July 2011 to June 2021, there were 677 deaths linked to extreme‑heat injuries
Common Symptoms of Heat Stroke
Physical Symptoms
- Flushed, hot, dry skin (no sweating)
- Rapid pulse or strong heartbeat
- Nausea or vomiting
- Headache
- Difficulty breathing
Cognitive & Behavioural Symptoms
- Confusion or irritability
- Slurred speech
- Seizures
- Fainting or loss of consciousness
Causes & Who’s Most at Risk
Heat stroke occurs when the body’s internal temperature rises dangerously high (typically above 40°C). Several factors increase the risk of developing heat stroke, especially among certain groups of people in Australia.
- Prolonged exposure to high temperatures
- Strenuous physical activity in hot weather
- Dehydration
- Poor ventilation
High-risk groups include:
- Children and the elderly
- People taking medications that affect hydration (e.g., diuretics)
- Workers in outdoor or poorly ventilated environments
- Athletes and hikers during peak summer hours
Heat Stroke vs Heat Exhaustion
It’s crucial to differentiate between the two. Though both are heat-related illnesses, heat stroke and heat exhaustion differ in severity, symptoms, and required treatment. It’s crucial to recognise the signs early to prevent a medical emergency.
Heat Stroke
- Body temperature over 40°C
- Skin is hot, dry or flushed (may stop sweating)
- Altered mental state: confusion, agitation, seizures, or unconsciousness
- Rapid heartbeat and difficulty breathing
- Nausea, vomiting
- Medical emergency – call 000 immediately
Heat Exhaustion
- Body temperature is usually below 40°C
- Heavy sweating
- Cool, pale, clammy skin
- Dizziness or fainting
- Headache or muscle cramps
- Nausea without confusion
- Requires rest, hydration, and cooling
First Aid Treatment Steps
Emergency Action Plan (DRSABCD)
- Danger – Check for hazards
- Response – Check if the person is conscious
- Send for help – Call 000 immediately
- Airway – Ensure it’s clear
- Breathing – Look, listen, feel
- CPR – Begin if unresponsive and not breathing
- Defibrillator – Apply if available
Cooling Techniques
- Move the person to a shaded, cool area
- Remove excess clothing
- Apply wet towels or spray the body with water
- Fan the person to promote evaporation
- Use ice packs on neck, armpits, and groin
- Immerse in cool water if available
When to Call 000
Always call emergency services if the person:
- Has a temperature over 40°C
- Loses consciousness
- Has seizures or confusion
- Stops sweating or breathing normally
Prevention Tips for Australians
Australia’s summer, which spans December to February, often brings intense heatwaves, particularly in inland and northern regions. January and February are typically the hottest months, with multiple states experiencing temperatures exceeding 40°C.
According to the BOM and CSIRO’s State of the Climate report, heatwaves now cause more deaths in Australia than any other natural hazard, including floods and bushfires. Here are some prevention tips:
- Avoid outdoor activities during peak sun hours (10 AM–4 PM)
- Drink water regularly, even if not thirsty
- Wear light, breathable clothing and a wide-brimmed hat
- Never leave anyone in a parked car
- Check on elderly neighbours during heatwaves
Need Comprehensive First Aid Training?
Want to be prepared for emergencies like heat stroke? Enrol in our nationally recognised 
HLTAID011 Provide First Aid course. We offer hands-on training across major cities, including Brisbane, Sydney, and Melbourne.
FAQ’s
- What is the difference between heat stroke and heat exhaustion?
Heat exhaustion is a milder condition that may progress to heat stroke if untreated. Key differences include sweating (present in exhaustion, often absent in stroke) and mental status (confusion or coma in heat stroke). - How fast can heat stroke happen?
It can develop within 10–15 minutes in extreme heat or strenuous activity. - Can you recover from heat stroke?
Yes, but immediate medical intervention is critical. Delays can result in permanent organ damage or death.