Bualoi had moved along the country's northern central coastline before making landfall early on Monday, causing waves as high as eight metres, according to the national weather agency.
One person died after being caught in floodwater in Hue city, and another was killed by a falling tree in Thanh Hoa Province, the government's disaster management agency said.
Seventeen fishermen were missing after huge waves hit two fishing boats off Quang Tri Province, while another fishing boat lost contact during the storm, according to the agency.
"I've witnessed many storms, and this is one of the strongest," said 45-year-old Nguyen Tuan Vinh in Nghe An province as he was cleaning up debris.
Vinh's neighbours said they stayed up all night trying to protect their homes, even as the power to their apartment building went down.
"I stayed awake the whole night fearing the door would be pulled off by strong winds," said resident Ho Van Quynh.

A woman rides a bicycle on a flooded street after Typhoon Bualoi makes landfall in Nghe An province, Vietnam, September 29, 2025. Photo: Reuters
By 11:00 a.m. (0400 GMT), the typhoon was moving over Nghe An Province into Laos, with maximum wind speeds weakening to 74 kph from 117 kph when it made landfall, the weather agency said.
Bualoi has so far damaged 245 houses, inundated nearly 1,400 hectares of rice and other crops, and cut off access to several areas, the disaster management agency said in a report.
No major damage to industrial properties was mentioned in the report, though there are some large factories in or near Bualoi's path, including those owned by Foxconn, Luxshare, Formosa Plastics and Vinfast.
Ahead of the typhoon hitting, the government had evacuated more than 28,500 people, while hundreds of flights were cancelled or delayed as four airports in central provinces were closed.

Boats are kept on a road as Typhoon Bualoi nears, in Nghe An province, Vietnam, September 28, 2025. Photo: Reuters
The cyclone has triggered heavy rains across most of Vietnam since Saturday, and authorities have warned of the risk of severe floods and landslides.
Rainfall in several parts of the country was forecast to hit 500 millimetres from Sunday night through Tuesday, according to the weather agency.

A man walks on a flooded street after Typhoon Bualoi makes landfall in Nghe An Province, Vietnam, September 29, 2025. Photo: Reuters

People commute on a partially flooded street after Typhoon Bualoi makes landfall in Nghe An Province, Vietnam, September 29, 2025. Photo: Reuters
With a long coastline facing the East Vietnam Sea, Vietnam is prone to typhoons that are often formed east of the Philippines, where at least 10 people died after Bualoi hit there last week.
Reuters
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