At least 56 people have been killed and 22 are still missing as heavy rains left a trail of destruction in 11 Chinese provinces, officials said on Tuesday.
More than 1.85 million acres of crops have been damaged and direct economic losses totaled more than US$3.72 billion, the Ministry of Civil Affairs said.
The annual rainy season, which arrived in the second half of June, has been greater than normal. Water levels in more than 60 different rivers in southern China have risen above warning levels.
On Monday, the Chinese government announced it had allocated US$276.8 million to 20 provinces for disaster relief.
In the heavily-hit central Hunan Province, rain-triggered floods have killed 27 people with 8 missing. More than 38,000 homes collapsed and nearly more than 1.2 million were evacuated, local authorities said.
The water levels in Dongting Lake and several major rivers all rose above warning levels. On early Monday, the water level of the Xiangjiang River, a major tributary of Yangtze River, reached 39.51 meters, above the previous record of 39.18 meters set by a massive flood in 1998.
About 15,000 people have been sent to the front line and over US$23.5 million has been allocated to aid disaster relief in Hunan, the state Xinhua news agency reported.
Rain is expected to weaken in the region in the next few days, but weather forecasters predict downpours will move to the southwestern province of Sichuan, where a recent fatal mountainside collapse happened.