On June 18, scattered heavy rain occurred in the north, Central Highlands, and southern Vietnam. According to the National Center for Hydro-Meteorological Forecasting, thunderstorms and localized downpours were recorded in the mountainous and midland areas of northern Vietnam, with rainfall ranging from 10-30mm and some areas exceeding 70mm.

During the evening of June 18, thunderstorms also hit the Central Highlands and southern regions, with rainfall between 15-40mm, and over 80mm in some places.

Significantly, starting from the evening and night of June 19, northern Vietnam will experience increased rainfall both in intensity and coverage. In particular, the mountainous and midland regions will see moderate rain and scattered thunderstorms, with some areas experiencing very heavy rain between 20-40mm and even over 100mm. Other regions will have scattered showers and thunderstorms, with localized rainfall from 10-30mm, and some areas exceeding 70mm.

Despite the rain, parts of the region will still experience hot weather during the day. On June 19, the Red River Delta and Hoa Binh will see highs of 35-36°C, with some areas exceeding 36°C. Relative humidity will drop to 55-60%. From June 20, the heat is expected to ease. However, with rain following a hot day, extreme weather events such as thunderstorms, lightning, hail, and strong winds may occur.

From the night of June 20 to June 28, the weather service predicts continued showers and scattered thunderstorms in northern Vietnam. Specifically, from the night of June 20 to the night of June 21, the mountainous and midland areas may experience moderate to heavy rain and thunderstorms, with very heavy rainfall in some areas. Rain will mostly occur in the evening and at night.

In contrast, the heat in the region from Thanh Hoa to Phu Yen will persist until June 22 - two days longer than previously forecast. Evening and nighttime showers and isolated thunderstorms are expected.

On June 19-20, this central region will face intense heat, with temperatures reaching 35-37°C and sometimes exceeding 37°C. Relative humidity will also remain low, around 55-60%.

Elsewhere in the country, there will be scattered showers and thunderstorms in the evenings and at night. In the Central Highlands and southern regions, the southwest monsoon is active, bringing scattered rain and thunderstorms in the evenings and nights, with localized heavy rain; daytime conditions remain sunny.

The weather agency warns that thunderstorms could bring lightning, whirlwinds, hail, and strong gusts. Localized heavy rain may trigger flash floods in small rivers and streams, landslides on steep slopes, and flooding in low-lying areas.

Bao Anh