An official with the Anhui Water Resource Department said levels at more than 660 reservoirs in the province were above warning levels.
The level of the Shuiyang and Qingyi rivers, both tributaries of the Yangtze River running through Anhui, has also risen above safe levels.
Many of the reservoirs have begun discharging water under orders from the state flood-control headquarters.
In neighboring Zhejiang Province, the operator of eastern China's largest reservoir opened three of its nine floodgates yesterday to avoid the risk of overflowing.
It was the first time the Xin'anjiang Reservoir, part of the Thousand Island Lake tourist attraction, had been forced to discharge water since 1999, Zhejiang's flood control headquarters said. Authorities have cordoned off the area to prevent tourists from being swept away.
The area has suffered torrential rain for days now and the reservoir saw its water level rise above normal on Monday night. It may take 30 to 40 hours before it is back to a safe level, officials said.
Rain-triggered floods have hit 10 cities in Zhejiang since last Saturday, affecting more than 4.41 million local residents.
Dikes near the city of Lanxi were reported to have come close to overflowing due to surging water levels on the nearby Lanjiang River.www.china.org.cn