What are the causes of extreme heavy precipitation?

This year's storm came a little violently, and it felt a little early. According to the weather forecast in Shenzhen, at present, the rainstor

What are the causes of extreme heavy precipitation?

This year's storm came a little violently, and it felt a little early. According to the weather forecast in Shenzhen, at present, the rainstorm in each district is orange and the rainstorm in each district is yellow, and the lightning warning in the whole city takes effect, and the whole city has entered a state of rainstorm defense!

The rainfall process is characterized by strong suddenness, short-term rain, strong lightning, short-term strong wind of magnitude 7 and high disaster risk. It is the strongest short-term heavy precipitation in Shenzhen this year.

What is the reason for such extreme precipitation?

? Multiple factors * * * work together to cause extremely strong rainfall, which is characterized by long duration, wide area and strong spots. China is a rainy country, and the summer winds from tropical and subtropical oceans transport abundant water vapor to most parts of China. The synergistic effect of abnormal atmospheric circulation in East Asia is the direct cause of extremely heavy rainfall in many places.

? Global warming will inevitably lead to an increase in precipitation, and climate change is the fundamental reason for the intensification of extreme weather instability. Petrie Talas, Secretary-General of the World Meteorological Organization, once said that there will be more and more extreme weather events and natural disasters before mitigating climate change.

Under the background of global climate change, the environmental conditions of all extreme weather and climate events are also changing to varying degrees, and the positions and intensities of all weather systems and storms are also changing.

What should I do when the rainstorm comes?

? Pay close attention to the forecast and early warning information of the meteorological department about the rainstorm at any time. Don't take it lightly.

? Before the rainstorm comes, water retaining boards or heaps of soil are placed at the door of houses in low-lying areas.

? Before the rainstorm comes, close the doors and windows at home, especially the kitchen where rain may rush in. When indoors, the power supply and gas equipment should be turned off to prevent lightning strike.

? Before the rainstorm, go home in time or take refuge in solid public buildings. Don't risk driving or walking on the road.

? If the residence may be seriously flooded, you should leave the residence in advance and take refuge in a safe place.

? Pay attention to the weather forecast, try to avoid going out before the rainstorm, take the bus when you have to go out, and don't drive a private car. And pay attention to road information to avoid areas with stagnant water and poor traffic.

? Pedestrians who encounter heavy rain in the street should immediately enter the room to shelter from the rain, do not stay under tall buildings, and do not stay under large billboards to avoid being injured by falling objects. Pay attention to observation when walking in stagnant water to prevent falling into manholes, pits or holes.

? If you are in the wild, the river will rise violently if it rains continuously for a short time, so don't stay by the river. If this happens, we should move to hillsides, highlands and other places in an organized way according to the predetermined route. If it has been surrounded by floods, it is necessary to use boats, rafts, door panels, wooden beds, etc. Transfer water as much as possible; If the flood comes too fast to move, you should immediately climb the roof, tall buildings, big trees and high walls, take refuge temporarily and wait for rescue. Don't swim alone.