As the mercury rises with increasing temperatures, heatwaves are becoming more frequent and severe in many parts of the world. Although most people associate extreme heat with sweating, it is essential to note that exposure to extreme heat can cause severe physiological stress to the body. As the body is unable to regulate the heat, a myriad of health problems can occur.
According to health experts, the human body can experience fluctuations due to the effects of a heatwave, including changes in hydration levels, cardiovascular function, and even brain activity. Moreover, extreme heat can even lead to life-threatening health problems such as heatstroke, and it is imperative to understand the physiological responses of the body to recognise the early signs of a heatwave.
How the Body Tries to Regulate Temperature
The body normally seeks to regulate a constant temperature of 36-37°C. When the outside temperature increases, the body seeks to counteract the heat by employing various mechanisms to cool down like sweating. When the sweat glands release sweat, it evaporates from the body’s surface, thus cooling the body.
Another mechanism the body employs to cool itself is by increasing blood flow to the skin. The blood vessels on the skin’s surface dilate to enable the heat from the body’s core to escape.
In a heatwave, especially when the humidity level is high, sweat may not evaporate from the body’s surface. This may lead to the body failing to cool itself adequately, thus allowing heat to accumulate. This eventually makes the body unable to regulate its temperature, thus leading to heat-related diseases.
First Signs of Dehydration in a Heatwave
One of the first signs of a heatwave on the body is dehydration. When the temperature rises, the body sweats more to cool itself. This results in the loss of a lot of fluids, which contain important salts like sodium and potassium.
If the lost fluids are not replenished immediately, the body may start to dehydrate, which may impair the body’s functioning.The usual signs of dehydration are:
- Excessive thirst
- Weakness
- Dizziness
- Decreased urination with dark-colored urine
If the condition of dehydration becomes more serious, it may lead to confusion, low blood pressure, rapid heartbeat, or even fainting.In addition to the signs of dehydration, the condition may impair the body’s ability to cool itself, which may lead to more heat-related problems.
Heat Exhaustion: When the Body Begins to Overheat
If the body continues to lose fluids and electrolytes, it may lead to a state of dehydration known as heat exhaustion. It is a condition where the body fails to cope with excessive heat. When a body is suffering from heat exhaustion, it may display symptoms such as weakness, dizziness, or the feeling of nausea. In addition, it may display excessive sweating, headaches, and muscle cramps. In most cases, the body may display a cool, clammy look despite the hot weather.
Although heat exhaustion is not life-threatening, it is important to note that it needs to be treated urgently. It is important to move to a cool area, drink fluids, and rest to help the body recover from the condition. However, if the condition deteriorates, it is important to seek assistance to avoid the condition getting out of hand.
Heatstroke Symptoms That Should Never Be Ignored
Heatstroke is the worst form of heat-related illness. It is the most serious heatstroke symptom. It is characterised by a body temperature over 40°C, beyond which the body cannot regulate its heat.The major heatstroke symptoms include:
- Body temperature is too high
- Hot, flushed, or dry skin
- Confused or disoriented
- Fast breathing and rapid pulse
- Seizures or fainting
It is important to note that heatstroke is a serious condition that needs to be treated immediately. Failure to do so may lead to death.
Increased Stress on the Heart and Vital Organs
The extreme heat affects the cardiovascular system considerably. This is because, during extreme heat, the body attempts to cool down by increasing the blood flow to the surface of the body, causing the blood vessels to dilate. This, therefore, causes the heart to work even harder to maintain the blood circulation to the rest of the body.
For people suffering from heart problems, extreme heat can be a major challenge, especially because heatwaves are often associated with increased hospital admissions due to heart attacks.
Dehydration can also add to the stress experienced by the cardiovascular system, especially because the lack of blood will affect the functioning of vital organs such as the kidneys, whose functions will be impaired if the body has less blood than usual.
Effects on the Brain, Lungs, and Skin
It is not only the human circulatory system that is impacted by heatwaves. The human brain, lungs, and skin also experience various effects. For example, excessive heat can impair brain functions. This leads to irritability, tiredness, lack of concentration, and mood swings.
At times, excessive heat can impair the brain’s ability to control body heat. This can lead to confusion. This is a serious condition that can cause heatstroke.
It is also possible for heatwaves to result in respiratory complications. This is because excessive heat is associated with increased levels of air pollution. This leads to increased levels of ground-level ozone. This hurts the lungs.
The skin is also impacted by heatwaves. For example, excessive sweating can cause heat rashes. This is because excessive sweating blocks sweat ducts. Excessive exposure to the sun also leads to sunburns.
Staying Safe During Extreme Heat
Precautions that prevent heat-related illnesses are quite simple and straightforward. Drinking water regularly, wearing light clothes, and refraining from doing strenuous activities during the peak time of the day can go a long way in preventing such health complications.
Staying in a shaded area and using an air conditioner can also be quite helpful in maintaining a safe temperature for the body to function properly. Also, recognising early signs of such health complications can be helpful in taking timely precautions to avoid such situations.
As climate patterns are shifting and extreme heatwaves are becoming more frequent, awareness about their health complications is also becoming quite important. Knowing the health complications that extreme heat can cause to the body can be quite helpful in taking precautions to avoid such health complications.
Conclusion
Heatwaves are not just an unpleasant climatic condition but also a major strain on the human body and a possible cause of health complications. From dehydration and heat exhaustion to life-threatening heatstroke, exposure to extreme temperatures can affect multiple body functions, such as the heart, brain, and kidneys.
Identifying the early signs and taking precautions to prevent health complications from heatwaves can go a long way in reducing the risk of such health complications. As the occurrence of heatwaves is on the rise, awareness and timely precautions can be a major factor in the prevention of health problems and medical emergencies.