The National Centre for Hydro-Meteorological Forecasting (NCHMF) said a low-pressure trough combined with upper-level wind convergence will continue to bring heavy rain and thunderstorms to northern Vietnam, as well as the provinces of Thanh Hoa and Nghe An I the central region, from late July 27 through July 28.

Rainfall recorded between 7 p.m. on July 27 and 3 a.m. on July 28 exceeded 100 mm at several locations, including Bac Ninh province (125 mm), Thanh Hoa province (122.8 mm) and Nghe An province (148.6 mm).

On July 28, northern provinces as well as Thanh Hoa province are forecast to receive between 40 mm and 90 mm of rain, with some areas likely to exceed 200 mm. Thunderstorms may also bring lightning, hail and strong wind gusts.

Temperatures across northern Vietnam are expected to range from 23°C to 26°C overnight and 29°C to 32°C during the day, while Lai Chau and Dien Bien provinces in the northwestern region will remain slightly cooler at 27°C to 30°C.

Hanoi is expected to be among the areas most severely affected by the current weather system. Between the morning of July 27 and the morning of July 28, rainfall surpassed 100 mm at several monitoring stations across the capital.

Local forecasters expect moderate to heavy rain, with torrential downpours, to continue throughout July 28. The large volume of rain falling within a short period is likely to cause localised flooding in low-lying areas and major roads, disrupting traffic and daily life. The widespread rainfall is anticipated to ease significantly from July 29.

Meanwhile, mountainous and midland areas across northern Vietnam, including Cao Bang and Lang Son provinces, are expected to receive between 70 mm and 120 mm of rainfall through the night of July 28, with isolated locations exceeding 250 mm.

Continuous rainfall over recent days has already saturated the soil in many mountainous areas, weakening slope stability. Additional heavy rain could trigger flash floods along small rivers and streams, while the risk of landslides on steep hillsides is extremely high.

Heavy rain is also affecting the Central Highlands and southern Vietnam. Between the afternoon of July 27 and the morning of July 28, rainfall reached 136.6 mm in Lam Dong province and 61.4 mm in Dong Nai city.

From July 28 through the night of July 29, the Central Highlands and southern regions are forecast to receive between 50 mm and 110 mm of rain, with isolated areas likely to record more than 170 mm before conditions gradually improve on July 30.

Weather officials warned that prolonged heavy rainfall could cause flooding in low-lying residential areas, urban centres and industrial parks. Residents are advised to avoid traveling through flooded roads, river crossings and landslide-prone areas, and to follow official weather forecasts and emergency warnings to protect lives and property.

Helping hands bring hope to flash flood-hit people in Lai Chau

VOV.VN - Following devastating flash floods in Muong Than commune, Lai Chau province, communities, volunteers and local authorities have come together to provide food, essential supplies and emotional support, helping affected families gradually recover and rebuild their lives.