Bac Nha Trang Ward announced temporary drainage measures at the flood-prone intersection of Pham Van Dong and Doan Tran Nghiep streets.
The work involves lowering the pavement at a low-lying section of the road, allowing surface water to flow across it and into the sea. The measures are expected to be completed before October 10.
At the site, workers have lowered and concreted a pavement section about four metres long. Four large openings have also been cut into a coastal wave barrier to channel rainwater from the intersection into the sea at Hon Chong.
Local officials said the arrangement was intended solely to drain rainwater, while wastewater would continue to be collected separately and transported to a treatment plant.
The intersection has previously experienced flooding of 20-40 centimetres during heavy rain, forcing vehicles to slow down and sometimes causing prolonged congestion.
Tran Van Hiep, a local resident, said heavy downpours regularly overwhelmed the drainage system, occasionally bringing foul-smelling wastewater onto the road.
He welcomed the temporary measure but warned that a long-term drainage solution would be needed to prevent runoff from eroding parts of Hon Chong Beach.
Separately, Khanh Hoa authorities have approved an investment plan worth more than VND 230 billion (USD 8.75 million) for the first phase of a project to address wastewater pollution from Nha Trang's drainage network.
Funded by the provincial budget and scheduled for completion in 2028, the project aims to improve rainwater drainage and wastewater collection before discharge into the environment.
Under the plan, rainwater from Hon Chong to Hon Mot will be redirected to the sea through the Ba Lang outlet, while five existing outlets at Hon Chong, Doan Tran Nghiep, Dang Tat, Bac Son and Hon Mot will be closed.
Wastewater will be collected through separation chambers and pumping stations and transferred to the northern wastewater treatment plant.
Wastewater from Vinh Truong fishing port and Alley 10 on Dong Nai Street will be diverted to the southern treatment plant, while rainwater will drain into the Quan Truong River through the existing system.