Lekima, China’s ninth typhoon of this year, made landfall early on Saturday in the eastern province of Zhejiang with maximum winds of 187 km (116 miles) per hour, leaving behind a trail of destruction.
The death toll from a major typhoon in eastern China rose to 30 on Sunday, with 18 people missing, state broadcaster CCTV reported, as the storm moved further north up the coast.
In Zhejiang, many of the deaths occurred about 130 km north of the coastal city of Wenzhou, where a natural dam collapsed in an area deluged with 160 mm (6.3 inches) of rain within three hours.
The storm's downpours triggered a major landslide in the municipality of Wenzhou around 400 kilometres (250 miles) south of Shanghai.
"Torrential rains caused a landslide on a mountain that blocked a river below," national television station CCTV reported, adding that the resulting "dam" created a lake which swept downstream when it burst.
State media reports showed rescuers wading in waist-high waters to evacuate people from their homes, while the Ministry of Emergency Management said that more than one million people in the financial hub of Shanghai, as well as Zhejiang and Jiangsu provinces, have been evacuated due to the typhoon.