Abstract:A historically extraordinary rainstorm occurred in July 2024 in Yantai Municipality. Many stations recorded the maximum 6-hour and 24-hour rainfall since their establishment, with the maximum 24-hour rainfall in Haiyang City reaching a historical extreme value. Meanwhile, the rainfall in July was the maximum monthly rainfall in the hydrological data recordin Yantai. This paper summarizes the hydrological measurement and reporting mechanism carried out by Yantai Hydrological Center and the implementation of the "four previsions" work, laying a foundation for the plan in next step and providing a reference for the development of hydrological work in other regions.