Urban resilience is the main index to measure urban sustainable development ability. Climate change has increased the frequency of extreme weather and climate events. Urban meteorological departments have played an active role in improving the prevention and early warning of extreme disasters，strengthening the emergency coordination and linkage capacity of departments，and promoting public science publicity. Rainstorm is a common extreme weather with the highest frequency and the greatest disaster losses in China. In recent years，many mega-cities in China have been frequently affected by rainstorm disasters. Taking the July 21，2012 and July 20，2016 rainstorms in Beijing as examples，this paper makes typical case analysis，and takes meteorological departments as examples to analyze the main measures and effects of urban upgrading rainstorm disasters. The main measures taken by the meteorological department include：（1） improving the accuracy and advance of meteorological disaster warning；（2） strengthening the mechanism of inter-agency consultation to enhance the meticulous emergency response capability of extreme weather；（3） improving the capability of meteorological information service. As one of the mega-cities in Beijing，the case of meteorological departments to enhance the resilience of rainstorms is typical and useful for other cities.