Sihai network: rainstorm is a common natural disaster for us. Rainstorm will bring many inconveniences to our daily life and even cause casualties. What are the hazards of rainstorm? How to prevent rainstorm in summer?
What is torrential rain?
Rainstorm refers to the heavy rainfall, which is often formed in cumulonimbus. According to the meteorological regulations, rain with an hourly rainfall of more than 16 mm or a continuous 12-hour rainfall of more than 30 mm and a 24-hour rainfall of 50 mm or more is called 'rainstorm'. According to the rainfall intensity, the rainstorm can be divided into three grades, i.e. the rainfall in 24 hours is 50-99.9mm, which is called "rainstorm"; the rainfall between 100-249.9mm is called "rainstorm"; the rainfall above 250mm is called "rainstorm". However, due to the different characteristics of precipitation and topography, the standards of rainstorm and flood are different. China has always been a country with frequent rainstorms. Every year, except for some provinces and regions in the northwest, most regions almost have rainstorms. From April to June of each year, there are frequent rainstorms in South China.
What are the hazards of rainstorm
Rainstorm is one of the major meteorological disasters in China, which not only affects the production of industry and agriculture, but also may endanger people's lives and cause serious economic losses. Then, what are the hazards caused by rainstorm? The hazards mainly include flood disaster and waterlogging disaster.
1. Flood disaster
The occurrence of flood disaster is caused by too much or too concentrated water caused by heavy rain and rainstorm. And the torrential rain will cause flash floods, river flooding and so on. Flood disaster not only damages crops, forest and fruit industry and fishery, but also destroys farm buildings, industrial and agricultural facilities, even causes casualties of people and animals and serious economic losses. In the history of our country, the flood disaster is almost caused by rainstorm.
2. Waterlogging disaster
Waterlogging disaster includes two parts: waterlogging and waterlogging. Waterlogging is caused by the accumulation of water in the farmland after the rain, which exceeds the flood tolerance of crops. However, waterlogging is mainly caused by the high groundwater level, which often causes the soil water to be in a state of saturation, and the water in the active layer of crop root system is too much, which is not conducive to the growth of crops, thus forming a waterlogging disaster. But waterlogging and waterlogging disasters coexist in most areas, sometimes it is difficult to separate them completely, so they are called waterlogging disasters. Waterlogging disaster is caused by the rainstorm, the drainage is not smooth and easy to cause water logging, the soil pores are filled with water, which causes the root system of terrestrial plants to lack oxygen, the physiological activity of the root system is inhibited, the process of gas aversion is strengthened, and toxic substances are produced, so that the crops suffer and the production is reduced.
How to prevent rainstorm in summer
1. Know the weather forecast before you go out. Especially in summer, thunderstorms are coming. It's better to keep an umbrella or raincoat in your bag at all times. Just in case.
2. In case of heavy rain at home, close the doors and windows and turn off the power. If there's nothing special, don't go out, stay at home and enjoy the storm.
3. If there is a Rainstorm on the way, be sure to find a shelter, pavilion or shop, etc. Never hide under a tree. It's dangerous. If you take an umbrella, the direction of the umbrella head must be opposite to the direction of the wind. If you follow it, it will not only block the rain, but also easily damage the umbrella.
4. Generally, lightning will be accompanied by rainstorm, so lightning protection must be engraved during rainstorm. In case of thunderstorm and strong wind in the street, you should immediately go indoors to avoid rain, and do not hide or stay under the trees or billboards, so as to avoid falling objects and smashing.
5. If there is a Rainstorm on the way, find a nearest hotel to settle down. Never walk in the rain. Special driving. It's better to stop at a safe place and stay out of the rain.
What to do in case of rainstorm outside
1. Don't linger in the street. Go indoors for shelter.
2. Don't stay under the tall building, be careful of falling objects.
3. Turn on the car light when driving, and drive at a low speed.
4. Try to bypass the area with serious ponding as much as possible, and pay attention to observation when walking in the ponding to prevent falling into the manhole, pit or hole.