China News Service, August 2nd. According to the British Broadcasting Corporation (BBC), it is currently in the northern hemisphere's high-temperature summer season, and special attention should be paid to heatstroke prevention and sun protection.

So, how does hot weather affect people's bodies?

What knowledge and information do people need to know in order to cope with wave after wave of heat waves?

On June 24, 2021, local time, in Moscow, the capital of Russia, people enjoy the cool outdoors to cool off the heat.

How do heat waves affect people's brains and behaviors?

　　As the body heats up, the blood vessels expand.

This can cause low blood pressure, and the heart will work harder to pump blood throughout the body.

　　It can cause mild symptoms such as foot swelling or prickly heat, which is caused by leakage caused by blood vessel dilation.

　　At the same time, sweating can also cause the loss of body fluids and salt, thus breaking the balance between them.

　　Coupled with lower blood pressure, it will cause heat exhaustion, its symptoms include: dizziness, nausea, fainting, confusion, muscle cramps, excessive sweating and fatigue.

If blood pressure is too low, it can also increase the risk of heart attack.

Why does the body react like this?

　　This is because our bodies, whether in snowstorms or heat waves, try to maintain their body temperature at around 37.5 degrees Celsius.

It is the temperature at which our bodies function normally during evolution.

　　However, as the temperature rises, our bodies have to work harder, trying to cool down the core body temperature.

The body radiates heat to the surroundings by expanding more blood vessels on the surface of the body and starts to sweat.

On July 11, 2021 local time, California, USA ushered in high temperature, California's Death Valley National Park ushered in high temperature, people took photos with the temperature indicator.

What should you do if you see a person with heat exhaustion?

　　If a person with heat exhaustion can cool down within 30 minutes, then generally speaking, the problem will not be serious.

　　The British National Health Care NHS advises people: move them to a cool place; let them lie down and raise their feet slightly; let them drink plenty of water; cool down the skin, including spraying water on the body or wiping with a sponge, fan , Or put a cold pack on their armpits or neck.

　　But if it doesn't get better within 30 minutes, heat stroke may occur next.

People with heat stroke may stop sweating even though their body is overheated, and their body temperature may exceed 40 degrees Celsius.

They may also experience seizures or lose consciousness.

Who are more at risk?

　　Elderly people, or people with long-term medical conditions, such as heart disease patients.

They may not be able to cope with the stress caused by the heat.

　　Diabetes makes the body lose water more quickly, and some complications can change the condition of blood vessels and the ability to sweat.

　　In addition, the homeless are more likely to be exposed to the sun.

People living in penthouses are more likely to face high temperatures.

Do certain drugs increase the risk?

　　Medications may increase the risk.

People should take the medicine normally, but they need to keep as cool as possible and keep the body hydrated.

　　Diuretics increase the amount of urine produced by the body.

It has a wide range of uses, including the treatment of heart failure.

Under high temperature conditions, diuretics can increase the risk of dehydration and cause an imbalance of key minerals in the body.

　　Some drugs for treating epilepsy and Parkinson's disease can stop the body from sweating and make it more difficult for the body to cool down.

　　If the body loses too much water, some drugs such as lithium or statins can cause higher blood concentrations and cause health problems.

At that time, on July 21st, during the sand volleyball training, the staff sprayed cold water into the stadium.

The Swiss women's beach line was suspended for training because they could not get a foothold on the beach.

Will heat waves kill people?

　　According to reports, approximately 2,000 people die each year in England due to the high temperature.

Most of these are deaths due to heart attacks and strokes caused by the body trying to keep the body temperature stable.

　　Once the temperature exceeds 25 to 26 degrees Celsius, there will be a higher mortality rate.

However, there is evidence that deaths are often caused by high temperatures in spring and early summer, rather than "mid summer."

　　This may be because as summer comes, we begin to change our daily behaviors, and we are more accustomed to dealing with the heat.

How to keep cool?

　　Make sure you drink enough water or milk, tea and coffee are also fine.

But it is important to drink less alcohol, because excessive alcohol will increase the risk of dehydration.

　　If the outside temperature is higher than at home, it is best to close the windows and draw the curtains to keep the room cool.