Why is the new round of heavy rainfall in Henan extreme?

On August 20, due to the eastward movement of the upper trough, convective rainfall occurred in some areas of Henan, with strong rainfall. The Central Meteorological Observatory predicts that the strongest precipitation period will be from noon to midnight on August 22. Min, a meteorologist from China Weather Network, said that the heavy rainfall process in Henan was extreme, and the single-day rainfall at individual stations may approach or reach the extreme value of precipitation in August. In addition, it has the characteristics of short-term heavy rainfall, and the maximum hourly rainfall in some areas can reach 80 to120 mm.

Min said that this round of heavy rainfall will be concentrated in central and northern Henan, which does overlap with the extreme rainstorm area in Henan on July 20. Zhengzhou, Jiaozuo and Xinxiang, which were severely affected before, were all within the scope of this heavy rainfall. However, the intensity of this round of rainfall is obviously weaker than the extreme rainstorm in Henan on July 20, and the rainfall duration is relatively short.

Guide to rainstorm and flood prevention

1. This rainy weather system moves faster, and the duration of heavy rainfall will not be too long. The public is advised to stay at home as much as possible and reduce travel.

2. If you need to go out, pedestrians should not walk in stagnant water. Pay attention to roadside flood control safety warning signs, stay away from whirlpool places, prevent falling into dangerous areas such as deep wells and pits with missing manhole covers, and avoid wading risks.

Try not to take the subway. After the water enters the subway, the gate of the drainage pump is cut off, and the accumulated water cannot be effectively discharged.

4. If the vehicle is trapped by stagnant water, the following measures can be taken according to the water level. When entering the wading section, open the central locking in time to prevent failure after soaking. If you can open the door, open the door and escape. When the water level has reached the window but is not higher than the window, the door will not open, so you need to escape from the skylight or roll down the side window glass. When the vehicle sinks into the water, the front of the vehicle will reach the bottom first, and the air will accumulate in the rear of the vehicle. To escape to the rear of the car, use the air at the rear to maintain life. Take a deep breath, open the door or smash the window to escape.