The weather will not die.

Water at 45℃ can die of heat, but people won't stay in water at 45℃ for long. And the temperature of 45℃ is rare, of course, not many people will stay outdoors at 45℃ for a day.

Exceeding the temperature of the human body can cause death, which is achieved by affecting the heat dissipation function of the human body. Man is a warm-blooded animal, and the principle is that the heat production and heat dissipation of the human body are almost equal. When the temperature is high, the heat dissipation is slow, and the body adjustment reduces the heat production of the human body. When it is cold in winter, the body regulates to generate more heat. When the body temperature cannot be maintained at a normal level or at a high level of balance (fever), human functions will be affected, and in severe cases, people will die.

When people are in high temperature or water above 37℃, the heat dissipation of their bodies will be affected. When the temperature of internal organs rises, it will feel hot and dry from the inside out. The reason is that high temperature affects the metabolism of internal organs, and at the same time, the vasodilation of human body surface will lead to the decrease of blood flow of corresponding internal organs, which is one of the reasons why some people will faint when taking a bath at high temperature. At the same time, high body temperature will also bring about an increase in blood sugar, affecting the whole body's glucose metabolism.

The so-called high-temperature weather causes death, which is more radiation sickness, usually occurring in high-temperature and high-humidity temperature environment. The function of body temperature regulation is completely disordered, which leads to the disorder of water and electrolyte in human body, organ damage and functional loss. This is a very dangerous disease, which is related to the regulation of body temperature, water and electrolyte. The mortality rate is between 20% and 70%, and it can be as high as 80% for patients over 50 years old, which is quite dangerous.

This situation often happens in rural areas, mostly because of spraying pesticides in tall corn fields and other places. Because of the transpiration of plants, the ventilation of plants is not smooth, and the cooling of human body is affected. In addition, some farmers can't recognize the initial symptoms, only know that they are sweating and unconscious, and continue to work because of physical discomfort, leading to fainting. Because the crops were hard to be found by others, they died of heatstroke in the end. In cities, this kind of city scale also happens a lot, mainly in some limited space with unfavorable ventilation, so our country has formulated laws and regulations on high temperature operation to strengthen the protection of workers.

45℃ is already a relatively high temperature for human body. Being in a temperature environment higher than 45℃ for a long time will at least cause cryogenic burns. The so-called low-temperature burn generally refers to long-term contact with objects such as warm water bags with temperatures exceeding 45℃, which leads to skin and dermal edema. If you soak in water at 45℃ for a long time, it will at least cause a wide range of cryogenic burns, and people will still die, and this temperature is really not low for many people.