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How does hot weather affect the human body?

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How does hot weather affect the human body?

Suara.com – Hot weather unusual conditions, lack of ventilation, cramped conditions, to strenuous exercise are factors that contribute to increasing body temperature. If left unchecked, it can pose serious risks to our health.

Heat exhaustion occurs when your body is in a high temperature, which often occurs during physical activity in a hot environment.

If the body temperature exceeds 40 degrees Celsius, the body will lose the ability to cool itself, so it will experience heat stroke which can be fatal.

This is what you need to know about the dangers of rising body temperature for our health.

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How does extreme heat affect our body?

When the body temperature gets hotter, the blood vessels will open. This causes blood pressure to be lower and the heart to work harder to push blood around the body.

This situation causes mild symptoms such as an itchy heat rash or swelling of the legs due to leaking blood vessels.

The body reacts to an increase in temperature by increasing blood flow to the skin, which carries heat from the body to the surface. This will produce sweat which then evaporates and can cool the body.

But sweating causes body fluids and salt to disappear. In addition, most importantly, the balance of the two things in the body changes.

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That situation, combined with a drop in blood pressure, can lead to heat exhaustion.

Symptoms include dizziness, nausea, fainting, confusion, muscle cramps, headache, profuse sweating, and fatigue.

When blood pressure drops too far, the risk of a heart attack increases.

Why do our bodies react like that?

Our bodies try to keep their core temperature around 37.5 degrees Celsius, whether in a blizzard or in the middle of a heat wave.

This is the ideal temperature for the body to function properly.

But as the weather gets hotter, the body has to work extra hard to keep its core temperature low.

This condition will open more blood vessels near the skin so that the body can release heat out, so we start to sweat.

When the sweat evaporates, the process will dramatically remove the heat from the skin.

heat stroke

If the body temperature heats up to 39-40 degrees Celsius, the brain will tell the muscles to slow down so that fatigue begins to appear.

At temperatures of 40-41 degrees Celsius, heat exhaustion is likely, and at temperatures above 41 degrees Celsius, the body begins to die.

Chemical processes in the body begin to be affected by this situation, so that the cells deteriorate and are at risk of triggering multiple organ failure.

The body can no longer even sweat because at this point the blood flow to the skin stops, leaving it feeling cold and moist.

heat stroke (heat stroke), which can occur at temperatures above 40 degrees Celsius, requires professional medical assistance and if not treated immediately, the chances of survival are slim.

The best method for dealing with people experiencing heat stroke is to soak in ice water or apply ice to the groin and armpits, where arteries are important. But that treatment will depend on how long the body is at the high temperature.

George Havenith, professor of environmental physiology and ergonomics at Loughborough University, said that humidity greatly affects how much we sweat.

If the humidity is high, the ability to sweat is impaired, making the body feel uncomfortable.

But if heat occurs in dry conditions, sweating can help lower body temperature.

“We can evaporate a lot of moisture from our skin, but we also have to produce it,” says Prof Havenith.

“This means sweating profusely quickly, but people’s ability to produce sweat is also limited.”

For example, a person who runs at about 15 kilometers per hour at 37 degrees Celsius needs to produce four liters of sweat per hour.

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Can heat kill?

High temperatures can cause death. Most result from heart attacks and strokes when the body tries to keep its temperature stable.

A higher risk of death may occur after the thermometer exceeds the temperature of 25-26 degrees Celsius.

However, available evidence suggests that deaths tend to be caused by higher temperatures in spring or early summer than during “peak summer.” The first 24 hours of a heat wave are usually more dangerous.

It could be because we start to change our daily behavior as summer progresses, so that our bodies are more accustomed to dealing with the heat.

Who is most vulnerable?

Old age with some conditions such as heart disease can reduce a person’s body’s ability to cope with heat stress.

Diabetes makes the body lose water more quickly and some complications of the disease can interfere with blood vessels and the body’s ability to produce sweat.

Children and people who are sedentary may also be more vulnerable.

Brain diseases such as dementia can also make people who suffer from it do not realize the heat so they do not do anything about it.

People who are homeless will also be more exposed to the sun. Those living in vertical dwellings on high floors will also face higher temperatures.

What to do if you see someone experiencing fatigue or heatstroke?

  • If their body temperature can cool off within half an hour, then heat exhaustion is usually not serious.
  • Take it to a cool place.
  • Have them lie down with their legs raised slightly.
  • Ask them to drink lots of water, it could be a rehydration drink.
  • Cool their skin. Spray or scrub with cold water and shake it off. Cold compresses around the armpits or neck can also be good.
  • But if the condition does not improve within 30 minutes, then what happens next is heatstroke.
  • Heatstroke is an emergency, so you should seek medical attention.

This article is adapted from the article by James Gallagher

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