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Thunderstorms are active in Shenzhen
The previous wave of strong convection continued
A new round of heavy precipitation is coming
How to prepare for thunderstorms?
I've put together a guide
Let's check it quickly~
What kind of damage will be caused by being struck by lightning
There are four forms of lightning damage to people: direct lightning strike, contact voltage, side lightning strike and step voltage.
Direct lightning strikes
When lightning occurs, if the lightning directly hits the human body, there will be up to tens of thousands to hundreds of thousands of amperesere current, from the top of the person's head to the feet, and in serious cases, the victim will die.
Contact voltage
When lightning currents are vented through tall objects such as tall buildings, trees, metal structures, etc., the current can generate voltages of up to tens of thousands to hundreds of thousands of volts on these objects. If a person accidentally touches these objects, an electric shock accident will occur.
Side blitz
When lightning strikes an object, a strong electric current is discharged to the earth through the object, and if the person is near the object being hit, the electric current will break through the air between the person and the object, causing the person to be attacked from the side.
Step voltage
When lightning is released from a cloud to the earth, a potential field is created. In this case, if the potential of the person's feet is different, it will cause it to be struck by lightning.
Lightning can cause the following fatal injuries to the human body:
One is to damage nerves and heart. When a lightning current passes through the heart, the victim will experience vasospasm, cardiac arrest, and in severe cases, the heart will stop beating, and when the lightning current injures the nerve center of the brain, the victim will stop breathing. Sometimes the human body freezes the phenomenon.
The second is burns. When lightning currents pass through a person's body, they can cause electrical burns, lightning paralysis of muscles, and even scorching.
The third is the internal injury caused by the lightning shock wave. This kind of injury is delayed, and it seems that there is nothing wrong on the surface, but in fact, there may be skull fractures and internal organ damage, and it is best to go to the hospital for examination to confirm whether there is internal organ and bone damage.
Fourth, lightning strikes may also set the injured person's clothes on fire. If a person is not charged after being struck by lightning, he can be rescued on the spot in time. If the victim's clothes catch fire, immediately lay them down so that the flames do not burn their faces. In addition, water can be poured on the injured person, or thick coats and blankets can be used to wrap the injured person to extinguish the flames.
How can I protect myself from lightning strikes?
What should we pay attention to in thunderstorm-prone weather?
First of all, we should pay attention to avoid leading lightning to the upper body, and achieve "five avoidances": avoid lightning entering the "household" (do not open doors and windows); avoid lightning entering the "device" (do not turn on electrical appliances); avoid lightning entering the "tree" (do not hide from the rain under trees and poles), avoid lightning entering the "top" (do not stay on the top of the mountain, the roof of the building and other high places), avoid lightning entering the "wall" (do not touch the lightning rod and other metals on the wall).
It is best to take shelter indoors during thunderstorms
Close doors and windows immediately and stay away from balconies and exterior walls. Do not bathe with an electric water heater, it is best to unplug all mains, and do not approach or touch any metal lines, including water pipes, gas pipes, and various pipes in the bathroom.
Try not to answer and make calls to mobile or landline phones, as telephone lines and electromagnetic waves from mobile phones may introduce lightning and injury to people.
Don't be curious, stick your head and hands out of the window or stand on the balcony to avoid being struck by lightning.
If you are outdoors during a thunderstorm
Immediately seek shelter from buildings or reinforced concrete buildings equipped with lightning rods, and remember to stay away from towering objects such as trees, telephone poles, chimneys, etc., and do not stay in places with metal objects.
If you are hiding in a car, you should pay attention to turn off the engine, audio system, radio, etc., and close all windows so that the vehicle forms a completely enclosed space.
If there is nowhere to hide, look for a lightning safety zone. Squat down with your feet together on low ground in the safety zone to prevent injuries from stepping voltage.
Looking up at the apex of a higher object in the field of view, the area where the angle of view reaches more than 45 degrees, and the distance between people and objects is more than 4 meters and less than 10 meters, is the lightning protection safety zone.
Severe convective weather has a wide range of impacts and strong destructive power
Please pay attention to the early warning information in time
Take precautions
Source / Shenzhen Emergency Management National Emergency Broadcasting