As per the National Center for Hydro-Meteorological Forecasting, Hanoi will witness moderate to heavy rain along with thunderstorms during the night and morning of August 21. The rainfall is expected to range from 30 to 80mm, with some localized areas receiving over 150mm.

From the evening of August 20 through the following days, various regions including Thanh Hoa to Ha Tinh will also experience similar weather conditions, with thunderstorms likely. The northeastern region will have scattered rain and thunderstorms, with some areas potentially seeing over 50mm of rain.

Travelers planning activities in the northeastern region, Thanh Hoa, and mountainous provinces are advised to regularly check weather updates and avoid areas prone to flooding and landslides. Outdoor activities such as trekking and camping should be reconsidered during adverse weather conditions.

For Hanoi, the minimum temperature is forecasted to be between 25-27 degrees Celsius, while the maximum will range from 30-32 degrees Celsius. The weather will be cloudy with a possibility of strong winds, lightning, and hail during thunderstorms.

As the weather evolves, it is crucial for residents and visitors to remain cautious and prepared for potential disruptions due to heavy rainfall and thunderstorms.