What is the maximum temperature that the human body can tolerate?

The normal human body temperature is 36-37 degrees Celsius, and the maximum temperature that the human body can withstand does not exceed 45 degrees Celsius.

Maximum body temperature limit: The upper limit of the armpit temperature of about a normal person is usually.

If you have a fever, the maximum is 42.

But the maximum body temperature limit for the human body is about.

Ambient Temperature Limit: Approximately 116 The ambient temperature limit is the temperature at which the human body can still breathe while it is in the environment.

Experiments have found that due to the inability to evaporate heat through perspiration, the ability of people to withstand high temperatures in water is significantly lower than that in dry air.

Scientists have experimented on the highest temperature that the human body can tolerate in a dry air environment: the human body can last for a full 1 hour in an environment of 71;

At 82 hours, it can last 49 minutes;

At 93 hours, it can last 33 minutes;

At 104, it only lasts 26 minutes.

However, according to the relevant literature, the extreme temperature that the human body can tolerate seems to be higher.

The maximum temperature that a person can withstand is 46.5 degrees Celsius.

Minimum body temperature limit: 13.7 degrees Celsius.

The core body temperature of a person is 37 degrees Celsius, and generally speaking, the outside temperature is around 20 degrees Celsius, which can cause the body temperature to drop. Once the body temperature drops to 36 degrees Celsius, a person's ability to react and judge is weakened; It will be difficult to walk down to 35 degrees; When it drops to 33 degrees, people lose their minds; At 30 degrees, people lose consciousness. When the core body temperature reaches 24 degrees Celsius, the heartbeat stops.

However, the lowest known temperature record in the world is 13.7 degrees Celsius.

Maximum body temperature limit: 46.5 degrees Celsius.

This is also a proven result. Georgia, USA.

The temperature in Atlanta was 32.2 degrees Celsius, and Willie Jones, 52, suffered from heat stroke.

He was admitted to Glady Memorial Hospital in Atlanta, where his temperature reached a record high of 46.5 degrees Celsius and took 24 days to fully subside.

In the 18th century, a British physiologist used himself as an experimental subject. In a relatively dry condition,A person can stay in an environment of 120 for about 15 minutesIn this case, it is still possible to maintain a stable body temperature, and it should be noted that it only takes 13 minutes at 120 to roast a piece of beef.

When the surrounding environment is very humid, even if the temperature is only 40 50, the human body can only last for four or five minutes.

The reason for this is that in a dry environment, the sweat inside the human body will evaporate quickly under the influence of high temperature, and part of the heat in the body will also be carried out by the sweat to achieve the effect of heat dissipation. In a humid environment, the moisture in the air is already saturated, and the body will have difficulty sweating, and the speed of body heat dissipation will be greatly reduced, and then the human body will suffer from heat stroke.

WhileWhen the human body surface temperature exceeds 42, the central nervous system inside the body will be disorderedThe protein in the body will also be denatured, which is commonly known as "cooked", and if it is not carried out in time, it will face life-threatening danger.

Continued hot weather in Canada

In the last week, North America has been hit by hot weather, with many regions already exceeding 40 and some even reaching 47. Under the influence of this continuous hot weather, more than 700 people have died due to high temperature in Canada, and as the hot days continue, this data will continue to **.

Canadian epidemiologists say that the U.S. is killed by 3,500 heat-related deaths each year, far more than natural disasters such as typhoons and floods. Many parts of the U.S. are now facing high temperatures, and local hospitals are saturated with heat patients.

The normal body temperature of a person is generally around 37 degrees, if it exceeds 37 degrees, it is a fever, and the higher the temperature, the more serious the fever will be, and the more dangerous it will be. Generally speaking, the internal temperature of the human body reaches 42 or 43 degrees, which is already a very high temperature, which is also a limit that the human body can bear. However, the highest record of human body temperature in the world is degrees, which is actually beyond the range that people can bear, and people are not because of fever caused by high body temperature, but because of long-term work in a high temperature environment caused by the high body temperature.

Therefore, if it is found that the body temperature of the self-excited ear has reached 42 degrees or 43 degrees, then it must be very dangerous and should be sent to the hospital immediately. The maximum temperature of the human body is about 42 degrees Celsius, but if you touch something with a high temperature such as hot water, you have to divide it according to your feelings. Many people think that a cold causes a fever because the condition is getting worse, but this idea is not entirely correct, although fever is a sign of an aggravation of the disease, but it is also the result of a protective mechanism within the human body that is working.

Because the heat source directly affects the temperature control center of the human body during the fever, it will lead to the disorder of the temperature center of the human body, and the body temperature will rise if the body produces too much heat energy. If it is because the body is infected with bacteria, and the body does not produce new antibodies, it will also cause the person's body temperature to rise. This is because bacteria are detected in the body, so they want to increase the temperature to inhibit the growth of bacteria in the body, so as to improve the body's immune system so that the white blood cells in the body can kill these bacteria.

Therefore, we will find that colds are usually not easy to understand**, but after the fever, the cold will get better very quickly. <>

Fever caused by a cold is relatively common, but there are other conditions that can cause our body to heat up, such as leukemia, heat stroke, burns and connective tissue diseases. If the temperature of the body has been rising, and the temperature inside the body has reached about 42 degrees, it will affect the health and life safety of the human body. We usually read more or less people will also hear that some people burn their brains because they have a high fever and do not get a timely **, even if the fever is reduced, there will be a series of sequelae.

This is because the body's internal temperature regulation and other dysfunctions during the process of fever can lead to brain tissue injury, coma or death.

The temperature that the human body can withstand depends on what kind of medium the person is exposed to.

There are two types, one is the person's own body temperature, and the other is the temperature that the person bears in the environment.

Let's start with the person's own body temperature.

The minimum body temperature limit is approximate, which is determined by testing. The maximum body temperature limit for a person:. If you exceed it, you will die.

Let's talk about the temperatures that people are subjected to in different environments.

The lowest ambient temperature that a person can tolerate: If it is in dry outdoor air, a person can stay in the air at minus 62 for a short time. In 1994, a 2-year-old Canadian girl named Kari Kosolovsky was locked out of her door for six hours.

The outdoor temperature was minus 22 at the timeIn the end, the little girl was lucky to save her life, except for one left leg that had to be amputated due to frostbite. Adults have a much higher hardiness than children.

Although people can stay outdoors for a short time at dozens of degrees below zero, the supercold air will cause frostbite in the nasal cavity, trachea and lungs.

If it's in the water, it's completely different. It's not that water conducts heat well, but it's much denser than air, and if you immerse yourself in water at 0 degrees, an untrained person can lose consciousness in an instant, or end it up in less than 5 minutes. But for those who have been trained, they can stay in water at 0 degrees for dozens of minutes (winter swimming activities, etc.).

But in any case, you can't stay in 0 degree water for hours. If the water temperature increases by 10 degrees, people can stay in the water for 1 hour, but will not tolerate more than half a day; 20 degrees of water can last more than a day.

Other media, such as dry ice (-77 degrees) or liquid nitrogen (-196 degrees) from the experiment, fall into them and hang on the spot. Even contact with small pieces will cause severe frostbite instantly, because the instantaneous evaporation will cause the temperature of ** and the subcutaneous tissue to drop sharply, and it will freeze at once, and the human body will not have time to react at all.

The maximum ambient temperature that a person can tolerate: If in dry air, the maximum ambient temperature limit: about 116, which is the temperature at which the human body can still breathe in the middle of it.

Scientists have experimented on the highest temperature that the human body can tolerate in a dry air environment: the human body can last for a full 1 hour in an environment of 71; At 82 hours, it can last 49 minutes; At 93 hours, it can last 33 minutes; At 104, it only lasts 26 minutes. At 116 hours, he only gasped for a few minutes before hanging.

If it is in humid air, the ability of a person to withstand high temperatures is significantly lower than that of a person in dry air, about 60, due to the inability to evaporate heat through perspiration.

People's cold and high temperature tolerance is still a bit beyond your imagination.

The lowest extreme temperature that the human body can tolerate is about degrees, and at this temperature the human body will feel uncomfortable. The human body can withstand the maximum limit temperature of about degrees, at which the human body is damaged.

Studies have shown that the minimum temperature that the human body can tolerate is Celsius, and the maximum temperature that can withstand it is Celsius.

The minimum temperature that the human body can withstand is about 35 degrees, and the maximum temperature is 41 degrees.

It depends on the humidity.

As climate change causes global temperatures to rise, extreme heat is becoming an increasingly health threat. So, what is the highest temperature that people can tolerate?

The answer is simple: according to a 2020 study in the journal Science Advances, the wet-bulb temperature is 35 degrees Celsius. Wet-bulb temperatures are different from those reported by your local forecaster or favorite weather app that you may see.

On the contrary, the wet-bulb temperature is measured by a thermometer covered with a water-soaked cloth, which takes into account both heat and humidity. The latter is important because the more water in the air, the harder it is for sweat to evaporate from the body and cool the person.

Colin Raymond, a postdoctoral researcher at NASA's Jet Propulsion Laboratory, said that if the humidity is low but the temperature is high, and vice versa, the wet-bulb temperature may not approach the tipping point of the human body. However, when both humidity and temperature are high, the humidity gradually approaches dangerous levels. For example, when the air temperature is Celsius and the relative humidity is 30%, the wet-bulb temperature is only Celsius.

However, when the air temperature is C and the relative humidity is 77%, the wet-bulb temperature is about 35 C.

The reason why people can't survive in high temperatures and high humidity is that they can no longer regulate their internal temperature. Raymond told Living Science magazine:"If the wet-bulb temperature is higher than the body temperature, you can still sweat, but you can't cool the body to the temperature that is physiologically needed.

At this point, the body becomes hot – above 40 degrees Celsius. According to the National Institutes of Health, this can lead to symptoms such as a rapid pulse, changes in mental status, lack of sweating, fainting, and coma.

However, a humid bulb temperature of 95 degrees Fahrenheit doesn't cause immediate death: Raymond says it can take about 3 hours for that heat to recover. He said it was impossible to determine the exact timing, but the study tried to estimate it by immersing human participants in a hot water tank and moving them out when their body temperature began to rise uncontrollably.

There's also no way to confirm that 95 degrees Fahrenheit is a wet-bulb temperature that can't survive: Raymond estimates that the true number is between f and to.

Although no one can live in a wet-bulb temperature above about 35 degrees, lower temperatures can also be fatal. Exercise and exposure to direct sunlight are more likely to overheat. Older people have certain health conditions, such as obesity; People who take antipsychotics also can't regulate their body temperature, so heat kills them more easily.

That's why people sometimes die in high temperatures where the temperature doesn't reach 35 degrees.

Raymond said"Unfortunately, with climate change already in trouble, we will continue to heat up even if we stop emitting greenhouse gases today. "I think that those places I mentioned will inevitably deal with this issue in the foreseeable future, and I hope that more places will not be included in that list.