Downpours, hailstorms and a tornado battered parts of Yancheng city, destroying many houses. Extreme weather conditions were also reported from several townships in Funing and Sheyang counties in the suburbs of Yancheng, state-run Xinhua news agency reported.
It reported that so far, 98 people have been killed and over 800 inured in heavy rains in the province.
Gales of 125 km per hour battered several outer townships of Funing County, while in Sheyang, the winds reached 100 km per hour.
Witnesses said they saw huge trees falling and whole villages were levelled.
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Victims were dragged from the ruins of their homes and rushed to hospital, state-run Xinhua news agency reported.
"I heard the gales and ran upstairs to shut the windows," said Xie Litian, 62, from Donggou township of Funing County.
Xie said he saw utility poles uprooted and his tractor was blown away.
"I was drowned in my own sorrow, until I heard moans for help from a neighbour buried in the debris of her home," he said.
"This is the worst day I've ever faced," he said.
Top officials of Yancheng City are leading rescue and relief efforts in the affected villages.
On Wednesday, the Ministry of Civil Affairs (MCA) said 42 people were killed and 25 missing in China's 10 provincial - level regions in heavy rains in the last five days.
More than 460,000 people were relocated and 321,000 are in urgent need of emergency relief after continuous rainfall in the 10 regions in southern part of China including Zhejiang, Jiangxi, Hubei and Sichuan, since June 18, the ministry said.