"According to the updated figures as of 9 am (0200 GMT) Thursday, seven people have been killed, with one missing and one injured," said Hoang Hiep of the National Steering Committee for Storm and Flood Control.
Dozens of homes had their roofs blown off, hundreds of hectares of crops were damaged, and landslides have blocked traffic in mountainous areas of Thua Thien Hue and Quang Ngai provinces.
Heavy rain on Wednesday night and Thursday morning caused rivers to rise 2 to 6 metres above sea level.
Forecasters said heavy rain and floods will continue Thursday and Friday.
Last year, Vietnam was hit by seven major tropical storms or typhoons which triggered floods and landslides that left 435 people dead and missing, the government's General Statistics Office said.
In the first 10 months of this year, natural disasters have killed at least 293 people and total estimated losses were 2.7 trillion dong (160 million dollars). dpa mas im pw
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