However, authorities warn that the risk of flooding and landslides persists as the storm moves west.
After making landfall in northern Vietnam on Saturday, According to the Indo-Pacific Tropical Cyclone Warning Center, the storm had sustained sustained winds of up to 203 km/h (126 mph) as it struck Hai Phong and Quang Ninh provinces.
It blew off roofs from buildings, uprooted trees and caused power outages in the capital Hanoi.
Three people were killed in the northern province of Quang Ninh on Saturday, and another in Hai Duong near Hanoi, according to state media. Fishermen were missing at sea.
In the port city of Hai Phong, several areas were submerged in water up to 0.5 metres (1.6 feet) deep on Sunday, damaging power lines and poles, according to AFP.
Metal rooftops and commercial signs were seen flying across the city of 2 million, which was hit hard by the storm.
Power outage in some areas of Haiphong – Home to multinational factories – Four airports in northern Vietnam were closed for the entire day on Saturday.
At least 23 boats were seriously damaged or sunk at Hai Au boat lock on Tuan Chau Island, north of Hai Phong, according to local residents.
Pham Van Thanh, a 51-year-old sailor, told AFP he had never experienced such a strong and violent typhoon.
He said all crew members had remained on the tourist ship since Friday to prevent it from sinking.
“The wind was at our back and the pressure was so strong that no boat could withstand it,” he told AFP.
“Then the first one sank. And then another one sank.”
