Trees and billboards were torn down and thousands of homes damaged as the storm made landfall Friday, causing flooding and power outages along a large swathe of coastline.
"The roof of my house was blown off and all the bricks are gone. Here at my small shop, cakes, candies, bread and noodles are all wet," Phan Thi Lan, a vendor in badly hit Ha Tinh province, told AFP.
Roads were mostly deserted in Ha Tinh province, though emergency vehicles were seen speeding toward the coast, according to an AFP reporter at the scene. Elsewhere in the province, a large telecommunications tower collapsed, reported state-run Vietnam Television (VTV).
More than 79,000 people were evacuated across the four provinces expected to be worst affected, the Vietnam Disaster Management Authority said.
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Those who remained in the area fled desperately for safety.
"I have never seen such a bad storm. The roof of my house was blown away and the houses of many of my neighbours were also damaged. I ran here to the petrol station," construction worker Nguyen Van Tai told AFP.
By midday today more than 5,000 homes were damaged or destroyed in Quang Binh province, where one person was also reported killed, according to the province's deputy chairman Le Minh Ngan, speaking on VTV.
Another man died in Hue province when a river swept him away following heavy rains, officials said. A third was killed after he was knocked over by heavy rains in Ha Tinh province, according to state media.
Officials earlier said they were still moving people from their homes and had ordered boats ashore.
"The number one priority is ensuring people's safety," Agriculture Minister Nguyen Xuan Cuong said on VTV.
Several flights to the area were cancelled today, and most schools were closed as residents hunkered down.
"The kids stayed at home and there's not much in the markets. I bought enough instant noodles for the family, so I think we're good," Nghe An resident Nguyen Thi Hue, 58, told AFP.