Three people died after days of heavy rain in central and north Vietnam that flooded homes and submerged roads, disaster management authorities said Tuesday.
Access to several communities in central Ha Tinh province has been cut off, while the police and military have been mobilised to rescue people from high-risk areas.
A woman and a 13-year-old boy were found dead in the province after being swept away by strong currents.
A search for a 29-year-old woman, also in Ha Tinh, is ongoing, the flood and storm control department said in its latest report.
Hundreds of homes, crops and portions of the national highway and railway -- linking north and south Vietnam -- have been submerged in flood waters.
In northern Cao Bang province, which borders China, a man was killed when a large tree fell onto his house in heavy rain. Vietnam is frequently lashed by harsh weather in the rainy season between June and November.
Natural disasters including floods and landslides have left 136 people dead or missing in the country since the beginning of the year, according to the General Statistics Office.
More than 21,000 houses have been damaged, with more than 140,000 hectares of crops destroyed.
Scientists have warned extreme weather events globally are becoming more intense and frequent due to climate change.
Xinhua adds: Five people died and nine others were injured early Tuesday in Vietnam's northern province of Lang Son after a 16-seat passenger coach crashed into a semi-trailer and a container truck, Vietnam News Agency (VNA) reported.
The accident happened at Rung Cam slope in Huu Lung district at about 2:10 a.m. when the 16-seat vehicle rear-ended a broken semi-trailer parking on the right side of the road.
The steep road was dark without streetlights then, which led to the crash, local newspaper VnExpress reported, citing the Traffic Police Department.
The bus then collided with a container truck traveling in the opposite direction on the left lane.
One driver and 15 passengers were on the coach when the accident occurred. Four died on the spot and another died on the way to the hospital.
The passenger coach was badly mangled, VNA reported. The case is being further investigated.
In the first 10 months of 2023, there were 9,829 traffic accidents in Vietnam, killing 5,496 people and injuring 6,973 others, according to the General Statistics Office.