Extremely heavy rainfall hit Liulin, Hubei, and 21 people were killed and 4 missing. Why are floods so frequent this year?

According to news reports, this heavy rainfall in Liulin Town, Hubei Province is really worrying. According to official information, this heavy rainfall has caused more than 8,000 people in the town to be affected, 21 people died, and 4 people were missing. . How heavy is the precipitation this time? From 21:00 on the 11th to 9:00 on the 12th, 503 millimeters of rain fell in Liulin Town. From 4:00 to 7:00 on the 12th, when the rainfall was heavy, the rainfall reached an astonishing 373.7 millimeters. These are extreme values ​​since local meteorological records were recorded.

Liulin Town is surrounded by mountains on three sides. Heavy rains have caused serious water accumulation. The average water depth is 3.5 meters, and the water accumulation in the deepest place is as high as 5 meters. The sudden heavy rainfall caught people off guard. Although local cadres shouted through loudspeakers, knocked on doors and other means to remind people to move, they later even used police cars to sound the siren on the street. Most of the people were safely relocated and properly resettled, but heavy losses were still caused.

It is extreme weather and heavy rainfall again. In the past July, a once-in-500-year-old flood in Henan left people frightened. Heavy rainfall occurred one after another in Sichuan and Hubei, and the amount of rainfall was huge. , the short time is shocking. People can't help but ask, why are there so many extreme weather events and why are floods so frequent this year?

This year is indeed a disaster-prone year. Drought and floods have made many people’s lives worse. Even the Taklimakan Desert suffered floods. The Taklimakan Desert is one of the top ten deserts in the world. It usually receives very little rainfall. This time, 50mm of rain fell in three hours. It has been raining for half a year. The desert land is loose, and the heavy rainfall has led to some disasters.

The famous physicist Hawking once said that if humans do not protect the environment, the living environment of the earth will continue to deteriorate in the future and may eventually become a "fireball". Will this become a reality? It is not easy to find a balance between science and technology and the environment. Human beings are now in a stage of rapid development of science and technology. The damage to the environment has caused the greenhouse effect to intensify, which has a huge impact on the global environment and climate. If left unchecked, the earth may be destroyed. It will become like Venus and no longer suitable for human habitation.

Of course, there are also unique reasons for this year’s heavy rainfall. For example, the floods in Henan were caused by two typhoons that produced a large amount of water vapor. There are mountains behind Henan that blocked the water vapor from penetrating deeply. The large amount of water vapor could not escape in Henan. In the end, it was just It can cause heavy rainfall locally, eventually leading to floods in Henan.

You will hear a term behind these rounds of heavy rainfall in Jiangnan - subtropical high pressure. In the long run, rainfall in May is usually concentrated in South China, but it will be a little different in 2021. That is, the "subtropical high pressure" is very strong, so the rainfall is concentrated and the rainfall is heavy, causing disasters.