Persistent heavy rain has affected south China since April 19, with precipitation reaching record highs in several areas.
Meteorologists said the influx of warm and moist air from the southwest will result in extensive coverage and prolonged duration of rain and snow.
As of Thursday, 29 people were killed and another 16 people were still missing in disasters triggered by torrential rains in Hebei, according to data released in the news conference on Thursday morning.
Right before the games' opening ceremony on July 28, two drones from the AVIC Chengdu Unmanned Aerial Vehicle System — Haiyan I and Haiyan II — were flown to monitor and measure meteorological factors to obtain accurate and timely data.
Before this heavy rain, approximately 5,000 people have been urgently evacuated from the mountainous areas of Mentougou.