On June 25th, influenced by astronomical tide, the water level in the lower reaches of Qiantang River was high, and the drainage of flood water in Lanjiang River was slow, and the rainfall concentrated for a long time to form a flood peak. Large-scale continuous heavy precipitation in the early stage led to high water levels in ponds, reservoirs and major rivers. Lanxi, Zhejiang Province faces the second largest flood after the founding of the People's Republic of China.

The last Lanxi flood was June 20, 20 1 1 year, and the flood peak water level of Lanjiang reached 33.73 meters. ? The catastrophic flood also set two records: First, in the 24 hours from 8: 00 on June 19 to 8: 00 on the 20th, the water level of Lanjiang River rose by 7.03 meters, the largest increase since Lanxi recorded; Second, from June 14 to June 15, the water level of the Lanjiang River rose by 73 cm, the largest hourly increase since records began.

On the 25th, Lanxi Flood Control Headquarters issued an open letter to the people of the whole city, calling on the people of the whole city to participate in flood fighting and emergency rescue.

The letter said that the current flood control situation is very serious. It is predicted that the flood peak of Lanjiang River will arrive at 2 am on the 26th, with a water level of 32.20m, which is the second largest flood in Lanxi after the founding of the People's Republic of China. Lanxi Fangzhi and Civilization Office reminded citizens to pay attention to flood information in time, fully cooperate with flood fighting and rescue, actively support flood fighting and rescue, and actively participate in flood fighting and rescue.

The letter also called on citizens who have the conditions to send water to send warm, a frontline officer in flood fighting, to assist in logistics support and actively help the needy people around him. The city's party member cadres and youth league members should obey the organization and deployment, and once necessary, immediately go to the front line to participate in flood fighting and emergency rescue.

On 25th 16, Cai Yan, deputy secretary of Lanxi Municipal Committee and mayor, delivered a televised speech, and issued an emergency mobilization order for flood control and emergency rescue to the people of the whole city, mobilizing the people of the whole city to make all preparations for flood control and emergency rescue, actively cooperating with flood control and emergency rescue, staying away from dangerous areas, not watching or spreading rumors, and making due contributions for Lanxi citizens to win flood control and emergency rescue.