Burst
Author: Wanting Yang
2020-11-16 17:29
Last update date: 2020-11-16 20:52
A deadly fire broke out in a tenement building at 562 Canton Road, Yau Ma Tei, resulting in 7 deaths and 11 injuries, of which 7 were in critical condition.
According to the news, most of the dead and the injured were skin burns or smoke inhalation.
According to the records of the Fire Services Department, the fire alarm was classified as a Class I fire, and then it was classified as Class II with a large number of casualties. The incident was rescued in just 8 minutes. Why did it still cause serious casualties?
An accident and emergency department specialist explained that when a fire occurs in a confined space, the trapped people will be deprived of oxygen and breathe faster due to carbon dioxide poisoning. At the same time, they will be burned due to the high temperature of the fire. They will then inhale the carbon monoxide and cyanide released from the burning furniture. Poisoned by hydrogen.
Under the influence of the three major factors of hypoxia, high temperature and poisoning, people will lose consciousness and coma quickly, which can be fatal in just three to four minutes.
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According to the videos uploaded by the district councilors on Facebook and the clips provided by readers, it can be seen that the fire was violent, and the tongues of fire continued to emerge from the open windows. The trapped people in the burning unit were forced to climb out of the outer wall and escape from the bathroom window.
The firefighters classified the fire alarm as a Class I fire. Due to the large number of injured people, it was turned into a Class II accident with large numbers of injured people. The fire alarm was put out within 8 minutes. Firefighters rescued the unit near the kitchen, the outer wall of the building, and the back alley of the building 18 Unfortunately, 7 people died in the end, and 7 of the 11 injured were in danger.
It is understood that the injuries of the dead and wounded were mainly skin burns or smoke inhalation.
Accident and emergency department specialist Peng Jimao said that when a fire occurs in a confined space, the carbon dioxide content in the space rises rapidly, causing people in the room to breathe faster, resulting in hypoxia; the high temperature in the fire scene will also cause burns to the trapped persons; when there is oxygen in the air When the content decreases continuously, there will be "incomplete combustion" to produce carbon monoxide, and the large amount of burning of furniture will also release carbon monoxide and hydrogen cyanide gas. Inhalation of these toxic gases can cause poisoning.
Under the influence of the above-mentioned factors, the trapped person will soon lose consciousness, fall into a coma, and die within three to four minutes.
Even after surviving the fire, the wounded will burn the upper respiratory tract when inhaling the hot gas, causing the upper respiratory tract to swell, and chemical pneumonia will appear after 4 to 5 hours, making the situation very critical.
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