Deadly flash floods wreak havoc in northern Vietnam as heavy rain threat persists

Flash floods striking early Friday morning left a trail of widespread destruction across Lai Chau and Son La provinces in northern Vietnam. The disaster has claimed at least one life, with five other people currently reported missing. The hardest-hit areas include Muong Than and Than Uyen communes in Lai Chau, alongside Ngoc Chien commune in Son La. Heavy overnight rainfall, triggered by a low-pressure trough, caused torrents of floodwater to rush down from mountains standing more than 1,000 m high. The powerful currents swept across National Highway 32, damaging infrastructure before severely inundating local rice fields and isolating communities. According to the National Center for Hydro-Meteorological Forecasting, the Phuc Than observation station recorded 206 mm of rainfall between 9 a.m. Thursday and 9 a.m. Friday. The vast majority of this torrential rain fell overnight and into the early morning hours, rapidly escalating the flood risk and catching many residents off guard. National Highway 32, a vital transport route linking Hanoi with Phu Tho, Lao Cai, and Lai Chau provinces, has suffered severe damage. In Hamlet 11 of Muong Than Commune, the force of the deluge caused several two-story houses along the highway to completely collapse. At the same time, large sections of the roadway were torn apart by the rushing floodwaters, disrupting travel and cutting off key transit links. A family of four in Muong Than Commune was swept away when the raging floodwaters destroyed their home. The father was later found more than one kilometer away from the site of their house, stranded on a small patch of land with a broken leg. Emergency rescue teams are continuing their search for his wife and two children. The floods also toppled power poles and damaged public infrastructure in Muong Than. In Than Uyen Commune, local authorities mobilized dozens of personnel to help residents evacuate from areas at high risk of landslides. Floodwaters also rose rapidly in neighboring Muong Kim Commune, overflowing streams and paralyzing traffic. A day earlier, on July 16, a landslide completely washed away a section of National Highway 12 between Chan Nua and Lai Chau provinces, creating further transit complications across the flood-stricken region. In neighboring Son La Province, torrential rain on the morning of July 17 triggered widespread mudslides, dumping heavy mud and debris onto roads throughout Ngoc Chien Commune. By the afternoon of July 17, local authorities confirmed that the flooding in Lai Chau Province had claimed one life, left five people missing, and injured two others, all in Muong Than and Than Uyen communes. The disaster has destroyed or damaged 22 houses across the region. In Muong Than, 13 homes were swept away by the floods, forcing emergency evacuations for the displaced families. Five houses in Pa U Commune sustained significant damage due to landslides triggered by the unstable terrain. In Son La's Ngoc Chien Commune, a landslide buried three homes in Dong Xuong Village. No casualties were reported as alert residents had evacuated the area before the debris struck. The National Center for Hydro-Meteorological Forecasting has issued urgent warnings that the danger is far from over. The center reported that mountainous and midland areas in northern Vietnam are expected to receive an additional 60 to 120 mm of rain from Friday night through Sunday. Isolated areas could see extreme accumulations exceeding 250 mm. Weather experts also warned that rainfall intensity could surpass 100 mm within a single three-hour window, increasing the immediate threat of urban flooding, flash floods, and landslides. Rain is forecast to persist through Sunday night and into Monday morning, bringing widespread totals of 20 to 50 mm, with some localized areas receiving more than 100 mm. After days of precipitation, advanced soil moisture models indicate that areas across Lai Chau, Dien Bien, Son La, and Lao Cai provinces are either close to or have fully reached saturation, meaning high risks of landslides.