The most devastating reports came from northern mountain provinces. A flash flood swept down a mountain and buried Lang Nu hamlet in Lao Cai province beneath mud and debris. State broadcaster VTV said 35 families lived there. Rescue workers had recovered 30 bodies and were searching for about 65 people, with only roughly a dozen residents known to have survived at that stage.
Floods and landslides caused most of the storm-related deaths. Lao Cai, which borders China and includes the trekking destination Sapa, was particularly hard hit. Persistent rain blocked roads and forced the suspension of trekking. Workers and residents described being unable to return to their villages because damaged routes remained vulnerable to further slides.
Transport disasters compounded the toll. A steel bridge over the Red River in Phu Tho province collapsed, sending ten cars and trucks and two motorcycles into the water. In mountainous Cao Bang province, a landslide swept a bus carrying about 20 people into a flooded stream, prompting another rescue operation.
Yagi made landfall with winds of up to 149 kilometres per hour, making it the strongest typhoon to strike Vietnam in decades. Although it weakened the following day, its rainfall continued and rivers remained dangerously high. The inundation spread into the capital, where residents were moved from threatened districts as Red River water covered streets.
The storm also disrupted northern Vietnam's export-oriented industrial centres. Floodwater and continuing rain damaged factories, while blocked roads affected movement through the region. Tourism around Sapa stopped as officials and businesses judged travel unsafe. Those economic effects came alongside the urgent search for missing people and the need to shelter communities displaced from rivers and unstable slopes.
The toll changed quickly as rescuers reached previously inaccessible locations. An earlier Associated Press report put deaths at 155 and missing people at 141, while the later government estimate reported by Al Jazeera raised those numbers to 179 and 145. Using the later figures avoids presenting a preliminary count as final, but authorities expected recovery work to continue.
Scientists have warned that warmer seas can supply more energy to tropical storms, increasing wind speeds and rainfall. Benjamin Horton, director of the Earth Observatory of Singapore, linked the broader trend toward stronger storms to climate change. Yagi's immediate consequences were visible in the destroyed hamlet, the failed bridge and the record river level: even after the winds eased, water and unstable ground remained the principal threats.
