What are the first, second and third natural disasters?

The first, second and third natural disasters are rainstorm, earthquake and tornado respectively. Rainstorm, rain with a water volume of more than 50 mm, is called rainstorm. Many parts of the world have suffered from heavy rains. China is also one of the countries with frequent rainstorms, with rainstorms in almost all provinces and cities. The worst-hit place in China is Zhumadian, Henan Province, on 1975.

Hazards of rainstorm, earthquake and tornado

The torrential rain brought by super typhoon Lenore triggered floods in the upper reaches of the Huaihe River. Dozens of reservoirs, including two large reservoirs, burst their banks, and nearly 600 million cubic meters of floods roared down instantly. Look at the north-south Beijing-Guangzhou line again, it was washed away 102 km, stopped for 18 days, and affected transportation for 48 days.

During the earthquake, the collision between plates, resulting in dislocation and rupture of plate edges and plates, is the main cause of the earthquake. Ecuador, a South American country, is located in the Pacific Rim earthquake zone, where earthquakes and volcanic disasters occur frequently. 16, 13 In April, an earthquake of magnitude 7.8 occurred in China with a focal depth of 19.2 km.

Tornado is a violent weather phenomenon, which is common in tropical and temperate regions, including the inland of the United States and Western Australia. Where tornadoes pass, trees are often pulled up, vehicles are overturned and buildings are destroyed. They often destroy crops in an instant, interrupt traffic, collapse houses, and cause losses to people, animals, life and economy.