Authorities in the central province of Phu Yen on Friday announced a state of emergency as landslides triggered by heavy rains badly damaged a section of the National Way 1A.
Pham Dinh Cu, chairman of Phu Yen's People's Committee, said landslides had hit more than one-third of the section or nearly 100 meters of the road in Tuy An District, and were threatening to spread the damage further.
At the moment, vehicles are only being allowed to move in one direction of the main road only.
In the announcement, Cu asked the district's authorities to evacuate locals from the landslide-stricken areas, and ordered traffic police to be on duty twenty-four-seven to manage traffic.
The provincial authorities also urged the Directorate for Roads of Vietnam's Roads Management Area No.5, which is in charge of roads in the central region, to open another road on the mountainous side.
Nguyen Van Son, chairman of People's Committee in Chi Thanh Town of Tuy An District, said the town has been struck by a big landslide and many "dangerous cracks" have appeared near residential areas.
Torrential rain starting last weekend have also brought floods and landslides to other provinces on the central coast like Quang Nam, Quang Ngai and Binh Dinh, isolating thousands of people, local news website VnExpress reported.
Meanwhile, the National Center for Hydro-Meteorological Forecasting Friday warned about a tropical low in the East Sea, about 330 kilometers from the coast of Quang Ngai and Khanh Hoa provinces.
There's little chance that it will strengthen into storm, but it would mainly cause rains in the sea, the center said, stressing that it still needs close observation.
Since last month Vietnam's central region has been continuously lashed by floods that have left hundreds of people dead or missing.