According to the National Centre for Hydro-Meteorological Forecasting, tide peaks are likely to occur between 2 pm and 5 pm, and again from 10 pm to 2 am, raising the risk of flooding in low-lying and unprotected areas along the coast from Ho Chi Minh City to Ca Mau.
From January 3 to 4, water levels along the southeastern coast are expected to rise further, with peak tides at Vung Tau possibly reaching 4.1-4.2 metres.
Tidal surges often flood low-lying parts of Ho Chi Minh City
Authorities warned that low-lying coastal and riverside areas, especially those outside dike systems, face a high risk of flooding, disrupting transport, farming and daily life while increasing saltwater intrusion.
Hydrology experts said high tides could also slow flood drainage in rivers across the southeastern region, with flooding likely during early morning and early afternoon hours.
The Department of Dyke Management and Disaster Prevention under the Ministry of Agriculture and Environment has urged affected localities to closely monitor forecasts, disseminate timely warnings and prepare response measures.
Cities and province are instructed to inspect vulnerable residential areas, dikes and reservoirs, clear drainage channels, arrange evacuations if needed and address infrastructure risks, while taking steps to protect crops, aquaculture ponds and ensure waterway safety.
