Rainfall of up to 70mm is forecast to hit northern mountainous provinces, including Lào Cai, Hà Giang, Tuyên Quang and Bắc Kạn on Monday afternoon and night.
The Ơ Đu are one of the five smallest ethnic minority groups in Việt Nam. Ơ Đu people have their own language, culture and customs, but these are in danger of being lost.
Mã Pí Lèng Pass is a dangerous pass, some 20km long at heights of 1,200 – 1,400m above sea level.
Sixteen Vietnamese citizens have been caught by border guards trying to illegally enter the Việt Nam from China.
Border soldiers and police in northern mountainous province of Hà Giang on Monday caught three groups of people trying to illegally enter China.