According to the National Centre for Hydro-Meteorological Forecasting, high tides are expected along the northern coast from July 13 to 16, with water levels at Hon Dau station in Haiphong forecast to peak at 3.78-3.90 metres before easing from July 17.
Along the central coast, tides are forecast to rise between July 13 and 15 before easing. The highest daily tide at Quy Nhon station in Gia Lai Province is expected to reach 2.08-2.12 metres between 9 am and 11 am, before falling from July 16.
On the south-eastern coast, tides are expected to increase until July 15, with water levels at Vung Tau forecast to peak at 3.70-3.73 metres between noon and 2 pm before gradually receding.
Hydrologists warned that elevated tides could slow flood drainage in rivers and generate strong offshore currents during ebb tides, posing risks to shipping, fishing and coastal tourism, particularly around ports and popular beaches.
Tides along the central coast are forecast to rise through July 15 before easing, with water levels at Quy Nhon station in Gia Lai Province reaching 2.08-2.12 metres.
Low-lying coastal and riverside areas, as well as communities outside flood-protection embankments, could experience localised flooding. Higher tides are also expected to increase saltwater intrusion into inland areas.
The Department of Dyke Management and Disaster Prevention under the Ministry of Agriculture and Environment urged affected provinces and cities to closely monitor forecasts and provide timely warnings to local authorities and residents.
Local authorities were also told to inspect vulnerable coastal areas and flood-control infrastructure, prepare evacuation plans where needed and clear drainage channels
The department also urged local governments to improve drainage, protect crops and aquaculture, reduce urban flooding and warn waterway operators of potential risks.
