What is the most harmful to the human body in a fire

Many people think that in the event of a fire, burns are the most harmful to people. In fact, smoke is the biggest risk factor for people to die in fires. The leading cause of death from smoke is carbon monoxide poisoning.

In air with carbon monoxide concentrations, a person can lose consciousness after two or three breaths, and 13 minutes of breath can lead to death. The amount of carbon monoxide in the flue gas produced by the combustion of commonly used building materials is as high. In addition, the smoke from the fire contains a lot of carbon dioxide.

There are also some materials, such as polyvinyl chloride.

Fibers such as nylon, wool, and silk can produce highly toxic gases when burned, which poses a greater threat to people. At the same time, smoke and gases in the fire can also lead to inhalation loss. Inhalation injury refers to the inhalation of certain chemical components of hot air, vapors, smoke, harmful gases, and volatile chemicals by the human body and causing the respiratory tract.

Damage to the lung parenchyma, and systemic chemical poisoning caused by inhalation of toxic gases and substances.

Carbon dioxide is suffocating, as are toxic gases. Most of the people who basically died were suffocated due to lack of oxygen.

Thick smoke, because it contains a lot of harmful gases, staying in it for a long time, will produce hallucinations.

Thick smoke, also known as carbon monoxide.

The hazards of fire are divided into: destruction of property, destruction of ecological balance, and adverse social and political impacts.

1. Destruction of property.

Every fire destroys property. Fire can burn the material wealth created by human beings through hard work, and turn towns, villages, factories, warehouses, buildings and a large number of means of production and living into ashes; fires, which can turn thousands of homes into ruins; Fires can devour dense forests and vast grasslands, destroying precious natural resources; Fires can burn a large number of cultural relics, ancient buildings and many other rare treasures, so that the precious historical and cultural heritage can be destroyed in one fell swoop.

2. Destroying the ecological balance.

The hazards of fire are not only manifested in the destruction of property and human life, but also serious damage to the ecological environment. Severe fires can also trigger famines and epidemics of disease, threatening people's health and polluting the environment. The extinction of animals and plants, the deterioration of the environment, the abnormal climate, the drought and lack of rain, the increase of storms, and soil erosion, the most important thing is to lead to the destruction of the ecological balance, which seriously threatens the survival and development of human beings.

3. Cause adverse social and political influences.

Fires not only bring huge losses to state property and citizens' personal and property, but also affect the normal social order, production order, work order, teaching and scientific research order, and citizens' life order. When the scale of the fire is relatively large, or when it occurs in the capital, provincial capital, densely populated places, economically developed areas, places of interest, etc., it will have adverse social and political impacts.

What to do in the event of a fire

1. Be calm and keep a clear head. For those trapped in the fire, the most important thing to do is to overcome panic, stay calm, and use reason to control their actions.

2. Call the police in time and take effective countermeasures according to the fire. When the fire first broke out, in addition to immediately calling the police, it should be actively extinguished; When gas and liquefied gas catch fire, close the valve with a wet cloth or wet clothes, and then water it with a basin; When electrical appliances, the power should be cut off first, and then covered with a quilt; If cigarette butts or furniture caught fire for unknown reasons, extinguish the fire as much as possible and transfer flammable materials. When the fire is so fierce that it is impossible to rescue it, you should leave the scene quickly without hesitation.

3. Take effective self-rescue measures and try to escape.

There are three types of disasters caused by fires:

1. Destroying property is easy to cause huge property losses.

2. Mutilation of human life.

3. Destroy the ecological balance.

First, many combustible materials used in buildings produce high temperature and high heat when burning, causing serious injury to people's bodies, and even causing shock and death.

The second is the toxic gases such as carbon monoxide released during the combustion of combustible materials in the building, which will cause symptoms such as breathing difficulties, headaches, nausea, and nervous system disorders after inhalation.

Fire. Refers to disasters caused by uncontrolled burning in time or space. In the new standard, fire is defined as uncontrolled combustion in time or space.

Among all kinds of disasters, fire is one of the main disasters that most frequently and universally threatens public safety and social development.

Hazards of fire combustion products to the human body: lack of oxygen, high temperature, soot, toxic gases

The harm of hypoxia to the human body: 1. When the oxygen content in the air is 21%, people's thinking is quick, judgment is accurate, and they can live freely. 2. When the oxygen content in the air is 15%, the coordination ability of human muscles is seriously affected, and the body is stiff, hard, coagulated, and sluggish to walk.

3. When the oxygen content in the air is 10%, although people are conscious, their judgment will be significantly reduced. 4. When the oxygen content in the air is 6%, the human body is in a state of shock, the brain is unconscious, the heart fails, and dies soon.

First of all, there is damage to property, and if the fire is serious, there is also damage to life. Fire and water are ruthless, once a fire occurs, it will cause unacceptable damage to people's lives and property.

The ability of human beings to use and control fire is an important sign of the progress of civilization. Therefore, the history of human use of fire and the history of fighting fire go hand in hand, and people constantly summarize the laws of fire while using fire, so as to reduce fire and the harm it causes to human beings as much as possible. In the event of a fire, people need to escape safely and as quickly as possible.

Fire – refers to a disaster caused by uncontrolled burning in time and space.

Combustion - is an oxidative exothermic reaction between a combustible substance and an oxidizing agent, usually accompanied by light, smoke, or flame.

The three elements of combustion: combustibles, combustibles, and ignition sources. For flame combustion, there must be an element of free radical chain reaction.

The main measures to extinguish the fire are: control of combustibles, reduction of oxygen, reduction of ignition point, chemical inhibition (for chain reaction).