People in Tan Chinh Ward in Da Nang City are placing blocks of wood and barrels and boxes of water on their roofs, which often get blown away by storms.
Early on Tuesday morning Storm Noru intensified and moved closer to the central coast.
It lay centered in the southeastern part of the Paracels archipelago at 7 a.m. with maximum winds of 183 kph, up from 149 kph the previous night.
The winds could maintain that strength by 7 p.m. Tuesday, when the storm would be situated 170 km from Da Nang and 120 km from southern neighbor Quang Nam Province, according to the National Center for Hydro and Meteorological Forecasting.
A family on Hoang Hoa Tham Street in Thanh Khe District pulls down and wraps trees on the rooftop in plastic.
A family in Hoi An Town in Quang Nam Province, south of Da Nang, reinforces the metal roof at home.
The national forecast center said by 7 a.m. Wednesday the storm would lie between Quang Tri and Quang Ngai Provinces with winds of 149 kph.
It is forecast to weaken into a tropical depression and then a low-pressure zone over Thailand.
The areas worst affected will be Da Nang and Quang Tri, Thua Thien Hue, Quang Nam, and Quang Ngai provinces.
A man in Tam Anh Nam Commune in Quang Nam's Nui Thanh District pumps water into a plastic bag placed on the metal roof of his house.
The roof of a house by the beach in Tam Thanh Commune in Tam Ky Town, Quang Nam, is secured by ropes tied to stakes placed around the house.