Sudden! More than 80 people died!

Original title: sudden! More than 80 people died!
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The tornado disaster suddenly struck the United States. At least 30 tornadoes hit six central states on the night of December 10. So far, more than 80 people have been killed, and the number of people affected may rise further. US President Joe Biden described this as a "completely unimaginable tragedy".
The United States is the country with the most tornadoes and can be called the "tornado kingdom", with thousands of tornadoes per year. How do tornadoes form? What should I do if I encounter a tornado?

On December 11 local time, a house in Mayfield, Kentucky, was seriously damaged by a tornado.
Six states were raided and more than 80 people were killed
It is reported that the six states hit by tornadoes in the United States are Arkansas, Mississippi, Illinois, Kentucky, Tennessee and Missouri.
Kentucky governor Bashir said at a press conference on the 11th that a candle factory in the state had been completely destroyed. When the tornado happened, there were about 110 workers in the factory, many of whom suffered misfortune.
At present, the death toll caused by the wind disaster is 79, and the final death toll may exceed 100.
Bethel said the tornado attack was "the worst in Kentucky's history". He declared a state of emergency in the state. The State National Guard is participating in the rescue.

On December 11 local time, a local nursing home in Monette, Arkansas, was seriously damaged by a tornado.
The tornado attack also killed one person and seriously injured five people in a nursing home in Arkansas; The roof of an Amazon warehouse in Illinois was overturned, killing at least two people; Three people died in Tennessee and one in Missouri.

On December 11 local time, a local Amazon warehouse collapsed during a tornado in Edwards Ville, Illinois.
In Edwards Ville, Illinois, an Amazon warehouse was severely damaged. At least 100 emergency vehicles arrived at the scene. At least one person was seen to be carried into a medical helicopter, but it was also reported that more than 100 people were trapped. In the early morning of the 11th, rescuers were still removing debris from collapsed buildings to determine whether anyone was still trapped.
According to the U.S. power tracking website, the tornado also caused about 330000 users in four states to lose power. When the National Weather Service issued a tornado warning, it said that 25 million people were expected to be affected.
Biden: unimaginable tragedy
The severe storm lasted from Friday to early Saturday morning, causing serious damage to six states in the United States.
U.S. President Joe Biden said on twitter on Saturday (11) that the series of deadly tornadoes sweeping the southern and Midwestern states of the United States is a "completely unimaginable tragedy".
Biden said: "the loss of close relatives in such a storm is an unimaginable tragedy. We are working with state governors to help ensure that they get everything they need to find survivors, and damage assessment is still ongoing."
In addition, Biden said he would visit Kentucky to ensure that it would not hinder rescue and recovery efforts.

On December 11 local time, in Mayfield, Kentucky, after the tornado, the local house was seriously damaged and in a mess.
Why are tornadoes active in the United States? How?
According to the data, tornadoes are the strongest convective storms in the earth's atmosphere. They are small-scale fast rotating air vortices generated under unstable weather conditions. They are often represented by funnel-shaped vortex cloud columns extending from the thunderstorm cloud bottom to the ground.
The wind speed near the tornado center can reach 100-200m / s, the diameter is generally between several meters and hundreds of meters, and the maintenance time is more than ten minutes to several hours.
Its destructive power is strong. It often pulls up trees, overturns vehicles, destroys houses, and causes casualties.
The United States is the country with the most tornadoes and can be called the "tornado kingdom". According to statistics from 1991 to 2014, the United States has an average of 1122 large and small tornadoes every year.
Because the United States is adjacent to the Atlantic Ocean in the East, the Pacific Ocean in the West and the Gulf of Mexico in the south, there is abundant water vapor, thunderstorm clouds are easy to occur and develop, and it is easy to meet the conditions for the formation of tornadoes. At the same time, there are many plains in the United States, and the central and southern plains are called "tornado corridor".

Data figure: Denver, Colorado was hit by a tornado.
Experts have warned that when encountering strong convective weather, people should pay attention to lightning protection, waterproof and shelter from the wind. For example, choose to avoid disastrous weather in frame structure buildings, do not take risks to avoid under trees, billboards, etc., do not stand in an open place, do not take risks to wade in water, whether people or cars, and choose to stop at a high place and wait for rescue.
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Source: China News Network
New Media Editor: Liu Qiao
(some of the content or pictures come from the Internet. Please contact us in time to distribute the royalties)
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