According to the National Center for Hydro-Meteorological Forecasting, the low pressure trough with its axis across the South Central and Southern regions has strengthened into a tropical convergence zone and connected with storm Yagi. The southwest monsoon is operating at medium to strong intensity, the low vortex area causing heavy rain in the South Central, Central Highlands and Southern regions.
The Central Highlands and the South have showers and thunderstorms, locally heavy to very heavy rain; the Central Central region has scattered showers and thunderstorms, locally heavy rain; the Northeast region has showers and thunderstorms. The rainfall from 7pm on September 2 to 3am on September 3 was over 60mm in some places such as: Sa Huynh (Quang Ngai) 67.8mm, Chu Drang (Gia Lai) 95.4mm, Sa Rai (Dong Thap) 112.8mm, ...
In the afternoon and evening of September 3, the Central Highlands and the South will have moderate rain, heavy rain and thunderstorms, locally very heavy rain with common rainfall from 20-40mm, locally over 100mm.
In addition, the Central region will have scattered showers and thunderstorms, locally heavy rain with rainfall from 15-30mm, locally over 70mm (thunderstorms concentrated in the evening and at night). Thunderstorms are likely to cause tornadoes, lightning and strong gusts of wind.
The meteorological agency also warned that on the evening of September 3, Typhoon Yagi could enter the East Sea as storm number 3. The northeastern sea area of the North East Sea will gradually increase to level 6, the area near the storm's center will increase to level 8, gusting over level 11, and the sea will be rough. People and tourists should not travel by boat in the Gulf of Tonkin from September 6 to September 9 to ensure safety.

Weather forecast for September 3 in 10 tourist cities of Vietnam:
Hanoi
Lowest temperature: 25-27 degrees C.
Highest temperature: 32-35 degrees C.
Hot and sunny during the day with some rain. Scattered showers and thunderstorms at night with strong gusts of wind.
Ha Long
Lowest temperature: 25-27 degrees Celsius.
Highest temperature: 32-34 degrees Celsius.
Hot and sunny day, cloudy with some rain. Night with few clouds and no rain.
Ninh Binh
Lowest temperature: 25-27 degrees Celsius.
Highest temperature: 32-36 degrees Celsius.
Day and night with scattered rain and strong winds.
Hue
Lowest temperature: 24-25 degrees Celsius.
Highest temperature: 33-34 degrees Celsius.
During the day there will be scattered thunderstorms and high UV index. At night the sky will be clear.
Danang
Lowest temperature: 25-26 degrees Celsius.
Highest temperature: 32-35 degrees Celsius.
Day and night with scattered showers and thunderstorms, strong gusts of wind.
Nha Trang
Lowest temperature: 24-25 degrees C.
Highest temperature: 29-32 degrees C.
Hot and sunny during the day, thunderstorms in some areas. Partly cloudy at night, no rain.
Dalat
Lowest temperature: 19-24 degrees C.
Highest temperature: 23-29 degrees C.
Day and night with showers and thunderstorms, strong winds.
Ho Chi Minh City
Lowest temperature: 24-25 degrees Celsius.
Highest temperature: 31 degrees Celsius.
During the day there will be scattered showers and thunderstorms with strong gusts of wind. At night there will be many clouds, no rain.
Vung Tau
Lowest temperature: 24-26 degrees Celsius.
Highest temperature: 29-31 degrees Celsius.
Thunderstorms and strong winds during the day. Partly cloudy and no rain at night.
Phu Quoc
Lowest temperature: 25-27 degrees C.
Highest temperature: 29 degrees C.
Day and night with scattered showers and thunderstorms, strong gusts of wind.