In recent days, under the influence of a tropical depression, heavy rain has occurred in many northern and north-central provinces and cities, affecting daily life and production.

Preliminary assessments suggest the dam failure resulted from prolonged heavy rainfall, which caused the water flow to surge to 1,572 cubic metres per second, breaking a section of the concrete at the water intake. The collapse also destroyed the central control room and damaged equipment. No casualties have been reported, though property losses are still being assessed.

The meteorological agency warned that all the 124 communes and wards across the province face a very high risk of flash floods along small rivers and streams, landslides in steep terrain and areas with weak geological structures, as well as flooding in low-lying and urban areas.

Between 6am and 11am on October 7, downpour and gale are predicted to persist across Hanoi, with rainfall reaching 40–70mm or even more than 100mm in certain places.

Prime Minister Pham Minh Chinh has ordered urgent measures to overcome the consequences of heavy rains, flash floods, and landslides triggered by Typhoon Bualoi – the 10th storm to hit the East Sea/South China Sea this year – which has caused severe human and material losses across northern and central provinces.

As Typhoon Kajiki, the fifth tropical storm to hit the East Sea this year, is moving towards north-central coast, authorities in central provinces have activated emergency measures.