NowPatient Blog
Heat stroke treatments?

Heat stroke treatments?

Navin Khosla NowPatientGreen tick
Updated on 9 Jun 2024

As the mercury rises and the summer sun beats down, heatstroke can be a threat to the well-being of some individuals. This life-threatening condition, characterized by a dangerously elevated body temperature, demands fast and effective action to prevent catastrophic consequences.

Heatstroke, a severe form of hyperthermia, can lead to organ failure, brain damage, and even death if left unchecked. Understanding this medical emergency, from its underlying causes to the latest treatment options, is paramount for safeguarding the health and safety of those vulnerable to its devastating impacts.

In this guide, we delve into the details of heatstroke, equipping you with the knowledge and strategies to recognize and respond to this condition.

Understanding heatstroke

Defining heatstroke

Heatstroke is a life-threatening condition that occurs when the body’s temperature rises above 104°F (40°C), typically as a result of prolonged exposure to hot, humid environments or strenuous physical exertion. This extreme elevation in core body temperature can lead to severe and potentially irreversible damage to the brain, vital organs, and other critical systems. Heat exhaustion and heatstroke are both types of hyperthermia. Heat exhaustion does not usually need emergency medical help if you can cool down within 30 minutes.

There are two distinct types of heatstroke: exertional and non-exertional. Exertional heatstroke is often the consequence of physical overexertion in hot, humid conditions, such as during intense athletic activities. In contrast, non-exertional heatstroke, also known as classic heatstroke, can develop due to age, underlying health conditions, or exposure to extreme environmental temperatures, even without physical exertion.

What causes heat stroke?

Heatstroke is the body’s inability to regulate its temperature effectively. This can occur due to a variety of factors, including:

  • Dehydration: Inadequate fluid intake can impair the body’s cooling mechanisms, leading to a rapid rise in temperature
  • Certain medications: Drugs that affect the body’s temperature regulation, such as diuretics, sedatives, and heart/blood pressure medications, can increase the risk of heatstroke
  • Pre-existing medical conditions: Individuals with conditions that impair sweating or thermoregulation, like cystic fibrosis or sleep disorders, are more susceptible to heatstroke
  • Age and physical fitness: The very young, the elderly, and those in poor physical condition are at a high risk of developing heatstroke
  • Environmental factors: Prolonged exposure to high temperatures and humid weather, particularly without access to cooling mechanisms, can overwhelm the body’s temperature control systems

Understanding the underlying causes and risk factors is crucial for preventive measures and treatment of heatstroke.

Signs and symptoms of heatstroke

Heatstroke is a medical emergency that requires immediate attention. Recognizing the early warning signs and symptoms is crucial for initiating timely and effective interventions.

Physical signs

The physical signs of heatstroke can include:

  • Elevated body temperature (above 104°F or 40°C)
  • Flushed, hot, and dry skin (in non-exertional heatstroke)
  • Excessive sweating that persists even after stopping physical activity (in exertional heatstroke)
  • Rapid breathing or fast heart rate
  • Nausea, vomiting, and diarrhoea
  • Headache, dizziness, and balance problems
  • Seizures or loss of consciousness

Other symptoms

Heatstroke can also present as:

  • Confusion, disorientation, and delirium
  • Problems with movement and coordination
  • Loss of consciousness
  • Altered mental status, including agitation or lethargy

Organ problems

Prolonged exposure to extreme heat can lead to the deterioration of various organ systems, including:

  • Acute respiratory distress syndrome (ARDS)
  • Kidney failure
  • Liver dysfunction
  • Metabolic abnormalities
  • Nerve damage and neurological complications
  • Diagnosing heatstroke

Healthcare providers will typically start by conducting a thorough physical examination, focusing on the following key elements:

  • Measuring core body temperature, typically using a rectal thermometer for the most accurate reading
  • Assessing the patient’s mental status, including signs of confusion, disorientation, or altered consciousness
  • Evaluating the patient’s skin for signs of flushing, dryness, or excessive sweating
  • Monitoring vital signs, such as heart rate, blood pressure, and respiratory rate


To confirm the physical signs of heatstroke healthcare providers may order a range of laboratory tests, including:

  • Blood tests to assess electrolyte levels, liver and kidney function, and the presence of any metabolic abnormalities
  • Urinalysis to check for signs of dehydration and kidney dysfunction
  • Imaging studies, such as chest X-rays or electrocardiograms (ECGs), to evaluate potential organ damage

These diagnostic tools help healthcare providers determine the severity of the heatstroke, identify any underlying medical conditions, and guide the most appropriate course of treatment.

Immediate treatment for heatstroke

Heatstroke is a medical emergency that requires prompt and aggressive intervention to lower the body temperature and prevent further damage to vital organs. The primary goal of heatstroke treatment is to cool the body and restore normal function quickly

Cooling the body

The most effective way to lower the body temperature in a heatstroke patient is through rapid cooling techniques, which may include:

  • Cold water immersion: Submerging the patient in a cold or ice bath is considered the most effective method for quickly lowering the core body temperature
  • Evaporative cooling: Spraying the patient with cool water while using fans to promote evaporation can also help dissipate heat
  • Ice packs and cooling blankets: Applying ice packs to the neck, groin, and armpits, as well as using specialized cooling blankets, can help lower the body temperature
  • Monitoring

Throughout the treatment process, the patient’s condition will be closely monitored, and any emerging complications will be addressed promptly. This may include:

  • Continuous temperature monitoring to ensure the body temperature is lowered to a safe range
  • Frequent assessment of organ function, including the heart, lungs, kidneys, and liver
  • Provision of supportive care, such as mechanical ventilation or dialysis, if necessary

The duration of hospitalization and treatment intensity will depend on the severity of the heatstroke and the patient’s response to the initial interventions.

Preventing heatstroke

Heatstroke is a preventable condition, and taking proactive measures can significantly reduce the risk of this life-threatening emergency. By implementing a comprehensive approach to heat-related illness prevention, individuals can safeguard their health and well-being during periods of extreme heat.

Hydration and fluid intake

Maintaining adequate hydration is a crucial step in preventing heatstroke. Individuals should:

  • Increase fluid intake, particularly by consuming water or electrolyte-replenishing beverages, such as sports drinks
  • Avoid sugary or alcoholic beverages, as these can further dehydrate the body
  • Monitor urine color as a rough indicator of hydration status, aiming for light yellow to clear urine

Clothing and cooling strategies

Wearing appropriate attire and utilizing cooling mechanisms can help the body regulate its temperature more effectively:

  • Choose lightweight, light-colored, loose-fitting clothing for better air circulation
  • Seek out shaded or air-conditioned environments whenever possible to escape the direct heat
  • Use fans, misting devices, or evaporative cooling techniques to promote heat dissipation
  • Gradual acclimation

For individuals who will be exposed to humid, hot environments, gradually acclimating the body can help enhance its thermoregulatory capabilities:

  • Gradually increase the duration and intensity of physical activity in hot conditions over several weeks to allow the body to adapt
  • Modify or reschedule strenuous activities and exercise during the hottest parts of the day, when possible
  • Take frequent breaks and rest periods to allow the body to cool down

Vulnerable populations

Certain individuals, such as the elderly, young children, and those with underlying medical conditions, are at a higher risk of heatstroke. Special precautions should be taken to protect these vulnerable populations, including:

  • Closely monitoring their hydration and temperature status
  • Ensuring they have access to cool, air-conditioned environments
  • Assisting with medication management and other healthcare needs

Recovering from heatstroke

Recovering from a heatstroke episode can be a complex and arduous process, with the potential for long-lasting complications and an increased risk of future heat-related illnesses.

Potential complications

Heatstroke can have far-reaching effects on the body, and individuals may experience a range of complications during their recovery, including:

  • Neurological impairments: Cognitive dysfunction, memory problems, and balance issues may persist for weeks or even months
  • Organ damage: The kidneys, liver, and other vital organs can suffer temporary or permanent damage due to extreme heat exposure
  • Thermoregulatory dysfunction: The body’s ability to regulate temperature may be impaired, leading to ongoing sensitivity to heat and increased susceptibility to future heatstroke episodes


Heatstroke is a medical emergency that demands immediate intervention to prevent devastating consequences. By understanding the underlying causes, recognizing the early warning signs, and mastering the latest treatment strategies, individuals can be better equipped to confront this life-threatening condition with confidence and resilience.


Medical Disclaimer

NowPatient has taken all reasonable steps to ensure that all material is factually accurate, complete, and current. However, the knowledge and experience of a qualified healthcare professional should always be sought after instead of using the information on this page. Before taking any drug, you should always speak to your doctor or another qualified healthcare provider.

The information provided here about medications is subject to change and is not meant to include all uses, precautions, warnings, directions, drug interactions, allergic reactions, or negative effects. The absence of warnings or other information for a particular medication does not imply that the medication or medication combination is appropriate for all patients or for all possible purposes.

Now Patient Data Security

Data Security

Our Commitment to You.

Find out moreNow Patient Data SecurityNow Patient Data Security

What is NowPatient

Telehealth and Online Pharmacy

NowPatient is a licensed online pharmacy and doctor service that is available around the world. Our service is FREE and packed with valuable features that can benefit your health such as medication reminders, educational blogs, medically approved symptoms checker, UK NHS online pharmacyprivate treatment plansRx Advantage cardhealth conditions information, affordable medications options, genetic testinghome test kitshealth riskspollen meterair quality monitor, weight loss plans, drug savings programs and lots more!

A laptop screen displaying a health dashboard with widgets showing health profile, notifications, personalized health tools, and favorite widgets including body mass index and weight loss tracking.


To improve the lives of everyone by making high-quality care accessible and convenient

We are here to improve lives. Our service gives you access to smart features and resources that can help empower you to take control of your health and improve your health outcomes. All this, in one place, for FREE. We strive to bring a fresh perspective to managing health. NowPatient can be accessed by downloading the App or using your web browser.

Download our app today

A collage showing a map with pharmacies, a questionnaire, medication details, and a person video chatting on a screen.

Can I trust NowPatient

Meet our medical team

We are a passionate group of clinicians and medical writers covering a broad range of specialities with experience operating in health systems in the United Kingdom & United States. Providing excellent care and advice is at the heart of everything we do. You can read more about our medical team by visiting the medical team page or learn more about how we curate content by visiting our editorial process

Your Questions Answered

For your peace of mind, we can answer your questions quickly

We have a comprehensive list of FAQ’s on each feature page. Alternatively, for broader questions around our service just click the button below.
Find your answers