Doctors are warning that heatwaves are causing far more than dehydration, with emergency rooms increasingly treating patients suffering from severe, life-threatening complications affecting multiple organs. According to Dr. Md Nadeem, head of emergency medicine at Fortis Hospital Gurugram, prolonged exposure to extreme temperatures can rapidly escalate from heat exhaustion to heat stroke and organ failure.

Emergency departments are seeing patients arrive with symptoms such as severe weakness, repeated vomiting, abdominal pain, diarrhea, dizziness, confusion, and even loss of consciousness. Because many people mistake these symptoms for food poisoning, stomach infections, or ordinary fatigue, medical treatment is often delayed until serious damage has already occurred.

Heat exhaustion typically presents with excessive sweating, dehydration, fatigue, and dizziness. However, when the body's cooling mechanisms fail, heat stroke can develop. Heatstroke is a medical emergency characterized by a core body temperature above 40°C along with neurological symptoms such as confusion, delirium, seizures, or unconsciousness. Patients may also experience rapid heartbeat, breathing difficulties, and dangerously high body temperatures.

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Doctors warn that severe heat illness can trigger multiple complications, including acute kidney injury, liver dysfunction, respiratory distress, electrolyte imbalances, and a serious clotting disorder known as disseminated intravascular coagulation. One of the most concerning complications is rhabdomyolysis, a condition in which muscle tissue breaks down rapidly and releases substances into the bloodstream that can overwhelm the kidneys and lead to kidney failure.

A recent case involved a 62-year-old woman who spent two days shopping for her daughter’s wedding during an intense heatwave. After feeling unwell and continuing her activities, she was found unconscious and taken to hospital with a body temperature of 107°F (41.7°C). Doctors diagnosed her with heat stroke and multiple organ dysfunction, requiring nearly two weeks of intensive care treatment.

Health experts note that extreme heat places significant pressure on healthcare systems. Studies estimate that heat-related conditions contribute to more than 10 lakh excess emergency department visits annually in India. Vulnerable groups include older adults, young children, outdoor workers, people with heart disease, kidney disease, or diabetes, and individuals taking medications that affect fluid balance or temperature regulation.

Doctors advise seeking prompt medical attention during heatwaves if symptoms such as persistent vomiting, abdominal pain, diarrhea, unusual weakness, dizziness, confusion, behavioral changes, or extreme fatigue develop after heat exposure. Early recognition and treatment remain crucial in preventing heat-related illnesses from progressing to organ failure and other potentially fatal complications.

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