Death from heat: heat stroke and hyperthermia
- Finding
Death from heat leaves almost no autopsy findings: it is diagnosed from the circumstances, a timely body temperature and ruling out other causes.
What it is
Death from hyperthermia occurs when the body cannot lose heat and core temperature rises until several organs fail. It can be environmental (heat waves, unventilated homes, children left in closed vehicles, hard work or exercise) or internal, as in cocaine or amphetamine toxicity, malignant hyperthermia during anaesthesia, neuroleptic malignant syndrome and serotonin syndrome. At autopsy there is no characteristic sign: findings are non-specific and, if the person survived hours or days, injury to the liver, muscles, kidneys and clotting appears. The diagnosis rests on the scene, the body temperature measured as early as possible and the exclusion of other causes.
How to tell it apart
- Versus hypothermia: in heat the scene, the high temperature and rapid decomposition point the way; in cold, the scene and other signs do.
- Versus a natural cardiovascular death on a hot day: heat can be a cause or a contributing factor; both are recorded on the certificate.
- Versus poisoning: toxicology separates substance-induced from environmental hyperthermia.
- In a review of heat deaths in New York City, none of the decedents with available information had a working air conditioner in use.
How to recognise it
- Scene: a hot, closed place, windows shut, no air conditioning or fan in use, or a closed vehicle in the sun.
- Body: sometimes still warm to the touch at the scene; early decomposition.
- Autopsy after rapid death: congested organs, brain and lung oedema and petechiae, all non-specific.
- If there was survival: liver necrosis, rhabdomyolysis, kidney injury and signs of disseminated intravascular coagulation.
How it forms
- Ambient heat, humidity and exertion exceed the body's ability to lose heat.
- Age, chronic disease, some medicines and lack of water reduce the response to heat.
- Some substances and drugs increase heat production in muscle or disturb the central control of temperature.
Next step: what to do and document
- At the scene, measure and record the body temperature, the time and the room temperature, and describe the ventilation and the place.
- Ask about illnesses, medicines, substance use and the conditions in which the person was found.
- Take samples for full toxicology and, if the person was admitted, retrieve the temperature and the admission tests.
- Record heat on the death certificate as a cause or as a contributing factor, as appropriate.
- If the victim is a child or a dependent person, inform the authority so a possible neglect can be investigated.
Common mistakes
- Not measuring the body temperature at the scene, or measuring it late without recording the time.
- Certifying a natural death without considering heat as a cause or contributing factor.
- Not requesting toxicology in hyperthermia in a young person.
- Leaving out an investigation of neglect when the victim is a child or a dependent person.
Test yourself
Think of the answer, then tap the question to see it.
Which autopsy finding confirms death from heat stroke?
None is characteristic: the diagnosis rests on the circumstances, a timely temperature and the exclusion of other causes.
Why is it important to measure the body temperature at the scene?
Because afterwards the body cools and the supporting information is lost; the time and the room temperature are recorded too.
Which internal causes of hyperthermia must be ruled out in a heat death?
Cocaine or amphetamine toxicity, malignant hyperthermia, neuroleptic malignant syndrome and serotonin syndrome.
Which findings appear if the person survives heat stroke for hours or days?
Liver necrosis, rhabdomyolysis, kidney injury and disseminated intravascular coagulation.
Elsewhere in DurgiPedia
Connections
Educational content on forensic and legal medicine; not legal advice and no substitute for the technical guides of Colombia's National Institute of Legal Medicine and Forensic Sciences. Laws change: each page links the official text and says when it was last checked. For a real case, follow the guide in force and ask the competent authority.
Sources: Heat illness and deaths--New York City, 2000-2011 (Morbidity and Mortality Weekly Report (CDC), PubMed Central, 2013); Heat-Related Deaths - United States, 2004-2018 (Morbidity and Mortality Weekly Report (CDC), PubMed Central, 2020); Identification of liver proteins as biomarker for postmortem diagnosis of heat stroke through proteomics (Scientific Reports, PubMed Central, 2025).
Spotted a mistake?We are always improving for the community. Tell us what is wrong and our team will review it.Report a mistake
Representative model, for educational purposes only.