Emergency workers raced to evacuate thousands of people from severe floods Tuesday after Typhoon Yagi swept through northern Vietnam, killing 63 people and leaving 40 others missing. Yagi struck on Saturday with winds in excess of 149 kilometres (92 miles) per hour, making it the most powerful typhoon to hit northern Vietnam in 30 years according to meteorologists. The storm downed bridges, tore roofs off buildings, damaged factories and triggered widespread flooding and landslides. The north of the country — densely populated and a major manufacturing hub for global tech firms including Samsung — is now battling serious flooding, with several communities partially underwater. One-storey homes in parts of Thai Nguyen and Yen Bai cities were almost completely submerged in the early hours of Tuesday, with residents waiting on the roofs for help. Rescue forces were trying to reach residential areas to retrieve old people and children. On social media, relatives of those stuck in floodwater posted desperate pleas for help and supplies. In Hanoi, communities along the swollen and fast-moving Red River, which flows through the capital, were also partially under water, with people forced to evacuate. Phan Thi Tuyet, 50, who lives close to the river, said she had never experienced such high water. “I have lost everything, all gone. I had to come to higher ground to save our lives. We can not bring with us any of the furniture. Everything is under water now.” As well as the dead and missing, flooding and landslides have also injured at least 752 people, officials at the ministry of agriculture said Tuesday. Authorities stopped heavy vehicles crossing a major bridge over the Red River in central Hanoi Tuesday and suspended a train line across Long Bien bridge as the water level rose.