Water in Poyang Lake, China's largest freshwater lake, rose above the alert level on Thursday morning due to heavy rains that have soaked broad sections of the country.

The water level at the lake's landmark Xingzi hydrological station reached 19.03 meters at around 7 a.m., exceeding the 19-meter alert level.

The lake in east China's Jiangxi Province functions as an important natural reservoir along the Yangtze River, China's largest river.

Heavy downpours have lashed northern parts of Jiangxi since June 22, raising water levels in several rivers and lakes, said Wu Xuewen, a director of the province's emergency management department.

China's national observatory on Thursday renewed an orange alert for rainstorms as heavy rainfall is expected to continue in Chongqing and Shanghai, the Guizhou, Hubei, Hunan, Jiangxi, Anhui and Zhejiang provinces and southwest China's Xizang Autonomous Region.

Poyang Lake is fed by several rivers within Jiangxi. As a conjunction point, the lake adjusts the water levels of rivers during the dry and flood seasons.

As of 4 p.m. on Wednesday, over 702,000 people across five cities in east China's Anhui Province have been affected by the heavy downpours, of whom some 177,000 have been evacuated.

Meanwhile, the regional hydrology center in south China's Guangxi Zhuang Autonomous Region has maintained a blue alert for floods following recent rainstorms as of 9 a.m. on Thursday.

Villagers and officials in nearby villages said they were patrolling the lake around the clock to monitor the flood situation and ensure timely evacuation.

Jiang Hong, deputy head of Wukou Town, said the local government had evacuated the elderly and people with mobility difficulties from low-lying areas and led other residents to temporary shelters in more elevated locations while ensuring supplies of daily necessities.

From June 29 to July 2, the northern part of the province is expected to experience another around of precipitation, according to meteorological authorities.