Why can't it be in an open place when it thunders?

In an open place, when there is a strong lightning current, it will flow into the ground through the surrounding trees and spread around. Different voltages will be generated in different places, and the voltage difference between human feet will cause harm, which is usually called stepping voltage injury. If you have to hide under the tree to avoid the rain, you must keep a distance of 3 meters from the trunk.

When it thunders, it is forbidden to stand in the open space. If you are in an open place and it is too late to escape indoors, you should immediately tuck your knees in your hands, squat down on the ground with your feet together, lean forward, keep your chest close to your knees, and look down at the ground with your eyes, because your head is most vulnerable to lightning. Never support the ground with your hands, which will expand the contact range between your body and the ground and increase the risk of being struck by lightning.

Extended data:

When struck by lightning, master 6 kinds of first aid.

If you are struck by lightning, it is very important to save yourself at the first time. If lightning strikes your head and spreads to the ground through your body, it will paralyze your nerves and heart, which is likely to be fatal. When people are impacted by lightning current, their hearts either stop beating or the beating rate is extremely irregular, resulting in vibration. In both cases, blood circulation will stop, leading to brain nerve damage, and people may die within a few minutes.

Therefore, every second counts for the first aid of those who get an electric shock. At this time, emergency contact 120 should be made while the rescue is being carried out, and it should be sent to the nearest hospital for treatment, but the rescue work should not be interrupted on the way to the hospital. Everyone should master six methods of on-site first aid:

1. If the clothes catch fire, you should immediately lie down and put out the flame so that it won't burn your face, otherwise the injured person may die of lack of oxygen or burn. You can also splash water on the injured, or wrap it in a thick coat or blanket to put out the fire.

2. If the electrocuted person is in a coma and stops breathing, he should lie on his back, unbutton his clothes, and immediately carry out resuscitation, mouth-to-mouth resuscitation and chest compressions.

The key points of action are: put your hands on the middle and lower sternum 1/3 and press vertically. According to the ratio of 30∶2, artificial heart compression ventilation is carried out, that is, 30 heart compressions and 2 mouth-to-mouth resuscitation, and so on, until the injured person recovers breathing and heartbeat.

3. If the patient is burned or severely shocked after being struck by lightning, he should lie down immediately, put out the fire on his body and rescue him immediately. If the injured person is unconscious, but still breathing and heartbeat, it is very likely that he will recover himself. The injured person should lie down comfortably. After a quiet rest, send it to the hospital for treatment.

4. If you get an electric shock, cut off the power immediately. If you can't turn off the power, you can use sticks, bamboo poles, etc. Take the wire away from the body of the electrocuted person. Rescuers must never pull an electrocuted person by hand.

5, on the way to the hospital, the injured should pay attention to keep warm, if the injured appear manic, convulsions and other symptoms, to cold compress the injured. Do not apply ointment or unclean dressing to electric burns or wounds.

6, on-site rescue, don't move the wounded, if really need to move, rescue interruption time shall not exceed 30 seconds. When sending the wounded to the hospital, we should not only let them lie flat on the stretcher and pad their backs with flat and hard wooden boards, but also continue to take first aid measures. Do not stop the first aid until the medical staff takes over.

People's Daily Online-Seven Notices and Nine Taboos in Thunderstorm Days