The provincial hydro-meteorological centre said water levels on rivers and streams were expected to rise between June 9 and 10, with flood levels forecast to increase by 1.5-4 metres. Flood risk has been set at Level 1.
Water levels on the Red River and several other waterways were rising on June 9 but remained below warning thresholds, according to monitoring data.
Forecasters said flood peaks on major rivers were expected to stay below Alert Level 1, although smaller rivers and streams could reach Alert Levels 1-2.
Low-lying areas in several communes and wards face a heightened risk of flooding, while flash floods and landslides remain a concern along smaller waterways and on steep slopes.
Provincial authorities have instructed agencies and local administrations to review high-risk areas, update emergency response plans and prepare personnel, equipment and supplies.
Localities have also been asked to be ready to evacuate residents from dangerous areas if necessary and to inspect reservoirs, dams and other disaster prevention infrastructure to minimise potential damage.
Authorities are urging residents to closely follow weather forecasts and comply with disaster prevention guidance.