Why does it thunder? What are the precautions when it thunders?

Indoor lightning protection 1, when it thunders, the first thing to do is to close the doors and windows to prevent lightning from hitting the room directly or preventing spherical lightning from floating into the room. When encountering thunderstorm, people should not stand under the light bulb, but cut off the power supply of household appliances to avoid damage. 3. In thunderstorm weather, try not to dial, answer the phone or use the mobile phone to surf the Internet. Unplug the power supply, telephone lines, closed TV lines and other metal lines that may introduce lightning. 4, indoor, should also be left with the driver's metal pipes and sewer pipes connected to the roof. Don't pull the wires used to dry clothes and bedding to the window or door, lest the wires cause death. Outdoor lightning protection 1, in thunderstorm weather, don't answer and call the mobile phone outdoors, because the electromagnetic wave of the mobile phone can also cause lightning. At the same time, it is forbidden to get close to some running power facilities when it thunders. Under normal circumstances, people will not be struck by lightning when riding a car, but never stick your head and hands out of the window when being struck by lightning when riding a car. 3. In case of sudden thunderstorm, when your hair becomes stiff and stands up, you should squat down, lower your height, and put your feet together at the same time to reduce the damage caused by stepping voltage. Don't take shelter from the rain under the big tree. It is best to stay 5 meters away from the tree when it thunders. 5. When going out in thunderstorm weather, it is best to wear rubber shoes, which can keep warm. Precautions for indoor lightning protection 1. Pay attention to close the doors and windows to prevent lightning from hitting the room directly or preventing the invasion of side flash and ball lightning. People shouldn't stand under the electric light. 3. Try not to call or answer mobile phones and landlines, and don't use telephone lines to surf the Internet. 4. Showers and solar water heaters should not be used. Because the water pipe is connected with lightning protection grounding, lightning current can cause casualties through water flow conduction. 5. Stay away from metal objects such as water pipes and gas pipes exposed from buildings. 6. Before the thunderstorm comes, disconnect the line and unplug the power supply. Don't let the TV, computer, etc. Lead lightning into the room and damage electrical appliances will cause fire accidents. 7. Don't pull the wires for drying clothes and bedding to the window or door, lest the wires cause death. 8. When going out in heavy rain, it is best to wear rubber shoes, which can play an insulating role. 9. When it thunders on the road, never stick your head and hands out of the window. Precautions for outdoor lightning protection: Lightning usually hits the spire of the tallest outdoor object, so isolated tall trees or buildings are often the most vulnerable to lightning strike. When lightning is violent, people should abide by the following rules outdoors to ensure safety. 1. Don't stay at the top of high-rise platforms, hilltops, ridges or buildings (structures) in thunderstorm weather, and don't stay in small buildings, garages, carports, sentry boxes and nearby without lightning protection facilities. 2. Stay away from the exposed water pipes, gas pipes and other metal objects and power equipment in the building. 3. It is not advisable to hide under the big tree during a thunderstorm. If necessary, be sure to keep at least 5 meters away from your torso, squat down and put your legs together. 4. If there are ants crawling on your head, neck and hands when thunder and lightning strike, and your hair stands on end, it means that lightning is coming. Get down on the ground quickly to reduce the risk of being struck by lightning, and take away the metal ornaments, hairpins and necklaces you wear. 5. If you encounter a thunderstorm outdoors and have no time to leave tall objects, you should immediately find some dry insulation and sit on it with your feet crossed. Don't put your feet on the ground outside insulation, because water can conduct electricity. 6. When avoiding thunderstorm outdoors, be careful not to hold the ground with your hands. At the same time, put your hands on your knees, keep your chest close to your knees, and keep your head as low as possible, because your head is more vulnerable to lightning than other parts of your body. 7. When you hear thunder within a few seconds after seeing lightning outdoors, it means that you are in a dangerous environment near a thunderstorm. At this time, you should stop walking, put your feet together and squat down immediately. Don't get involved with people. It is best to use plastic rain gear and raincoat. 8. In thunderstorm weather, it is not advisable to open an umbrella in the wild, or hold high badminton rackets, golf clubs and hoes. To avoid increasing the effective height of people and being struck by lightning. Not suitable for outdoor ball games, playing football and basketball in thunderstorm weather is very dangerous; It is not advisable to stay on the water surface or water edge; It is not advisable to wash clothes, fish, swim or play by the river. 9. In thunderstorm weather, it is not advisable to drive a motorcycle, ride a bicycle or run fast in the rain, because the greater the stride of the body, the greater the voltage, and the easier it is to hurt people. 10. If you see the high-voltage line being broken down by lightning outdoors, you should be vigilant at this time because there is a step voltage near the breakpoint of the high-voltage line. People nearby must not run at this time, but should jump off the scene with their feet together. Signs before lightning strike When you stand in an empty mine, if you feel your hair suddenly stand on end, your skin will feel slight tingling, or even hear a slight crackling sound, making a "creaking" sound, which is a sign that lightning is about to hit you. In this case, you should squat down immediately. Before leaning forward, put your hands on your knees and bend them into a ball. Never lie flat on the ground. Rescue after lightning strike After lightning strike, strong voltage makes people's heart stop beating, so the cause of death is that the heart stops beating, not being burned. Therefore, if CPR can be used for rescue within 4 minutes, it is possible to be saved and the heart will return to beating. However, people have a wrong idea that there is still electricity in the human body hit by lightning, and they dare not touch him, which often leads to the delay of rescue time. If a group of people are struck by lightning, it doesn't matter to moan. First, save those who can't make a sound. Try not to use mobile phones. Professor Yu Zhihao, a meteorologist at Nanjing University, believes that due to the interference of lightning, the wireless frequency hopping of mobile phones is enhanced, which is easy to induce accidents such as lightning strike and machine burning. But generally speaking, there are lightning protection devices in public residential areas, and people are relatively safe in this environment. Thunder and lightning will only interfere with the mobile phone signal, damage the chip at most, and will not cause fatal harm to the human body. Once in the open area, people and mobile phones will become obvious bumps on the ground, and mobile phones are likely to become the discharge objects of Lei Yun's choice. Therefore, try to avoid making phone calls or answering mobile phones when it thunders, and it is best to turn off the power of mobile phones when walking through barrier-free areas in thunderstorm.