According to the National Centre for Hydro-Meteorological Forecasting, moderate to heavy rain is forecast across northern mountainous and midland provinces from the evening of June 15 through June 17. Some areas may experience intense rainfall within a short period, accompanied by thunderstorms, whirlwinds, lightning, and strong gusts.

Rain showers and thunderstorms have already affected several northern localities since June 14 following an extended period of hot weather. The development signals the arrival of a seasonal weather transition, with stronger and more frequent convective storms expected in the coming weeks.

Peak rainfall expected on June 16–17

Meteorologists said the most intense rainfall is likely to occur on June 16 - 17, mainly during the late afternoon, evening, overnight, and early morning hours. Some mountainous areas could experience exceptionally heavy downpours over short periods.

The weather pattern is being driven by an upper-level wind convergence zone combined with high temperatures accumulated during recent heatwaves, creating favourable conditions for the rapid development of convective cloud systems.

In addition to mountainous provinces, the Red River Delta and the capital city of Hanoi are also forecast to experience showers and thunderstorms over the next two days. Localised flooding may occur in low-lying urban areas if intense rainfall develops within a short timeframe.

Flash flood and landslide risks increase

Weather authorities have issued warnings over the heightened risk of flash floods along small rivers and streams, as well as landslides in northern mountainous provinces. Areas with steep terrain, unstable soil conditions, or a history of landslides are considered particularly vulnerable.

Prolonged rainfall may also trigger localised flooding in low-lying areas, disrupting transportation, agricultural activities, and daily life.

Local authorities have been advised to review vulnerable locations and prepare evacuation plans for residents living in high-risk areas if necessary. People are urged to avoid crossing flooded roads, low-water crossings, riverbanks, and landslide-prone routes during periods of heavy rainfall.

Rainfall brings relief from recent heatwave

Despite the risks, the rainfall is expected to provide relief from the prolonged heat that has affected Northern Vietnam in recent days. Temperatures in many areas are forecast to fall by 3–5°C, bringing cooler and more comfortable conditions.

However, weather experts noted that the rapid shift from intense heat to severe thunderstorms is one of the defining characteristics of the early rainy season this year. Residents are encouraged to monitor weather forecasts and disaster warnings closely in order to take appropriate precautionary measures.

Current forecasts indicate that the widespread rainfall is likely to persist through June 17 before gradually easing from June 18 onward. Nevertheless, Northern Vietnam may continue to experience intermittent showers and thunderstorms in the days ahead.

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