May 5, 2023

Heatstroke: Causes, Symptoms, and Treatment

With global warming at an all-time high, the weather worldwide has become very unpredictable. The rise in temperature is melting the ice caps and making it very hard for people living in tropical areas to tackle the heat. With summer fast approaching, it is important that we are fully prepared to handle the heat.

What is a heatstroke?

A heatstroke, also known as sunstroke, is a severe heat-related illness that occurs when the body's internal temperature rises above 40°C (104°F) or overheats due to prolonged exposure to high temperatures and humidity. This condition is a medical emergency and requires immediate treatment as it can be life-threatening.

In India, heatstrokes are a common problem, particularly during the summer months, when temperatures can soar above 45°C (113°F) in some parts of the country. According to the Indian Council of Medical Research, heatstrokes are responsible for a significant number of deaths during the summer months in India.

What are the symptoms of heatstroke?

The symptoms of heatstroke can vary in severity and can be different for each person. Some common symptoms include:

High body temperature (above 40°C/104°F): One of the main symptoms of heatstroke is a high body temperature above 40°C (104°F). The body's natural cooling mechanisms are overwhelmed and fail to regulate body temperature. This can lead to a dangerous rise in internal body temperature, which can cause damage to the body's organs.

Rapid heartbeat and breathing: Another common symptom of heatstroke is rapid heartbeat and breathing. The body tries to cool itself down by increasing blood flow to the skin, which can lead to a rapid heartbeat and breathing.

Headache: Headache is a common symptom of heatstroke, which occurs due to the expansion of blood vessels in the brain caused by high body temperature.

Dizziness and confusion: Heatstroke can cause dizziness and confusion due to the effects of high body temperature on the brain. This can impair cognitive function, leading to confusion and disorientation.

Nausea and vomiting: Heatstroke can cause nausea and vomiting due to the effects of high body temperature on the digestive system. These symptoms may also be due to dehydration.

Muscle cramps and weakness: Heatstroke can cause muscle cramps and weakness, particularly in the legs and arms. This is due to the effects of high body temperature on the muscles and can be exacerbated by dehydration.

Seizures or convulsions: In severe cases, heatstroke can cause seizures or convulsions, which are caused by the effects of high body temperature on the brain.

Loss of consciousness: Heatstroke can cause a loss of consciousness in severe cases. This is a medical emergency and requires immediate medical attention.

Who is at risk of developing heatstroke?

Anyone can develop heatstroke, but there are certain factors that do increase the risk of developing it. They are:

Age: Older adults, particularly those over the age of 65, are at increased risk of developing heatstroke. This is because their bodies are less able to regulate temperature, and they may have underlying medical conditions that make them more vulnerable to heat-related illnesses.

Infants and young children: Infants and young children are at increased risk of heatstroke because their bodies are less able to regulate temperature compared to adults. They are also more susceptible to dehydration due to their smaller size and higher metabolic rate.

Chronic medical conditions: People with certain chronic medical conditions, such as heart disease, diabetes, and kidney disease, are at an increased risk of developing heatstroke. These conditions can affect the body's ability to regulate temperature and respond to heat stress.

Medications: People who are taking certain medications, such as diuretics, antihistamines, and beta-blockers, are at an increased risk of developing heatstroke. These medications can affect the body's ability to regulate temperature and respond to heat stress.

Outdoor workers: People who work outdoors, such as farmers, construction workers, and street vendors, are at increased risk of developing heatstroke due to prolonged exposure to high temperatures and humidity.

Athletes: Athletes who engage in strenuous physical activity during hot weather are at increased risk of developing heatstroke due to the increased metabolic heat generated by their muscles. This can impair the body's ability to regulate temperature and increase the risk of dehydration. This is particularly true if the individual is engaged in physical activity or is unable to access air conditioning or other cooling measures.

People who consume alcohol: Drinking alcohol can increase the risk of heatstroke. Alcohol can impair the body's ability to regulate temperature and respond to heat stress, which can increase the risk of heat-related illnesses.

People who are obese: Obesity can increase the risk of heatstroke. This is because excess body weight can make it more difficult for the body to cool itself down, particularly in hot and humid conditions.