Chinanews.com, July 31. The Beijing Meteorological Observatory issued a yellow rainstorm warning signal at 14:50 today: Affected by heavy rainfall cloud clusters, it is expected that from now to 20:00, there will be precipitation with local hourly rain intensity of more than 50mm in Beijing. In mountainous and shallow mountainous areas, there may be secondary disasters such as small and medium river floods, mountain torrents, and geological disasters induced by heavy precipitation, and there may be accumulation of water in low-lying areas in cities, remind citizens to take precautions.