Heavy rains in Aba, Sichuan have caused casualties. How harmful are the mudslides caused by heavy rains?

The hazards of mudslides caused by storms include: harming fisheries and forestry, causing serious casualties to humans and animals, destroying houses and industrial and agricultural facilities, and causing massive economic losses. Extremely heavy rain is a kind of disastrous weather, which is often accompanied by severe water and soil erosion, flooding of a large number of crops, and other major economic losses. The main hazards include waterlogging due to poor drainage, filling of soil pores with water, and the lack of root systems of land plants. Oxygen inhibits physiological activities. Floods caused by heavy rains submerge crops, making it difficult for crop metabolism to proceed normally. Flash floods and river flooding caused by extremely heavy rains not only harm crops, fruit trees, forestry and fisheries, but also destroy agricultural communities and industries. Agricultural facilities may even cause casualties to humans and animals, causing serious economic losses. Different terrains have different effects on disasters caused by heavy rains. Plateau and mountains often form bypass currents and sulfur climbing due to their blocking effects, causing heavy rains. Plateau and mountains are most likely to induce landslides and debris flows under the action of heavy rains. Secondary disasters: Generally speaking, in basins and mountain plains, the ground slope is relatively large, mostly terraced terraces, with good drainage conditions. The area affected by floods is small and will not cause major disasters. However, if you encounter high Intensity, large-scale heavy rains, such as continuous heavy rains, are prone to serious disasters such as floods siege cities, and the industries in the basin and mountain top plain areas are relatively developed, which increases the vulnerability of these areas to heavy rain disasters. In plain areas, due to the flat terrain, With a vast area, impact mountain disasters rarely occur, but waterlogging disasters mostly occur.

Heavy rains can cause flash floods, overflowing rivers, and dam breaches, causing significant economic losses to people and the country. The main causes of heavy rains are weather and climate. After heavy rains occur, the geographical environment becomes an important factor affecting the occurrence of disasters. The geographical environment includes terrain. Landform, geographical location and river distribution, my country has a vast area and very complex terrain, including mountains, plains, basins, hills and other geographical environments