When is the heaviest rain in Beijing?

The heaviest rain in Beijing is 20 12.

On July 26th, 2065438, a rare rainstorm occurred in Beijing. On that day, Beijing was hit by continuous rainstorms, which brought serious floods and traffic paralysis to the city. According to the statistics of the meteorological department, the rainfall in Beijing reached an all-time high on July 2 1 and July 20 12. Since that afternoon, heavy rain has covered the whole city.

In just a few hours, Beijing, especially the urban area, was caught in a serious flood disaster. Roads are flooded, traffic jams, and almost all low-lying areas and underground parking lots are flooded. Heavy rain has brought serious disasters to Beijing, causing huge property losses and casualties. Flash floods occurred in many places, houses collapsed and roads were damaged.

Rescuers continued to carry out rescue work and thousands of people were evacuated to safe areas. This rare rainstorm event has triggered people's reflection and improvement on urban flood control and disaster resistance. Subsequently, Beijing started a series of flood control projects, which strengthened the upgrading of urban drainage system and the improvement of urban flood control capacity.

Cause analysis of rainstorm in Beijing

Meet cold and warm. The cold air from the north to the south and the strong warm and humid air from the southwest meet violently in North China. As a result, there is heavy rainfall in this area. The weather system covers the whole North China, and the intersection of cold and warm air is just over Beijing. Moreover, the sweltering heat for several days has accumulated rich water vapor for Beijing, and the water vapor south of Beijing has been continuously input, which has saturated the air humidity and created good water vapor conditions for rainfall.

Heat island effect. Urbanization increases rainfall, and the heat of underlying surface promotes the regeneration of cloud system. The temperature in the urban area may be 0.56℃ to 5.6℃ higher than that in the surrounding suburbs or rural areas. These extra heat will destroy the stability of urban air circulation, and may promote the formation of precipitation clouds and increase rainfall.

Baidu Encyclopedia -7.2 1 Rainstorm in Beijing