According to the National Center for Hydrometeorological Forecasting, due to the influence of a newly formed low pressure trough on a large scale, the Northern region, Thanh Hoa and Nghe An have scattered showers and thunderstorms in some places. Heavy rain with rainfall from 10-30mm, even over 50mm.
During thunderstorms, there is a possibility of tornadoes, lightning and strong winds. Localized heavy rain can cause flooding in low-lying areas, flash floods on small rivers and streams, and landslides on slopes.
This heavy rain is forecast to last until mid-week. Heavy rain will gather from today until August 22, mainly in the evening and night. Rainfall is commonly from 10-30mm, in some places it is over 50mm.
The area from Nghe An to Ninh Thuan is hot today, some places are extremely hot with the highest temperature commonly ranging from 35-37 degrees Celsius, some places are over 37 degrees Celsius; The lowest relative humidity is commonly 50-65%.

Weather forecast on August 19 in 10 tourist cities of Vietnam:
Hanoi
Lowest temperature: 25-27 degrees Celsius.
Highest temperature: 32-35 degrees Celsius.
Day and night are cloudy, with moderate rain, heavy rain and scattered thunderstorms. During thunderstorms, there is a possibility of tornadoes, lightning and strong winds.
Ha Long
Lowest temperature: 25-27 degrees Celsius.
Highest temperature: 32-33 degrees Celsius.
Day and night there are scattered showers and thunderstorms, with strong winds.
Ninh Binh
Lowest temperature: 25-27 degrees Celsius.
Highest temperature: 32-35 degrees Celsius.
Cloudy days and nights, with a few thunderstorms and strong winds.
Hue
Lowest temperature: 24-26 degrees Celsius.
Highest temperature: 34-37 degrees Celsius.
Cloudy day, hot sun, high UV index. Cloudy night, no rain.
Da Nang
Lowest temperature: 26-27 degrees Celsius.
Highest temperature: 33-37 degrees Celsius.
On a thunderstorm day, the UV index is high. Cloudy night, no rain.
Nha Trang
Lowest temperature: 24 degrees Celsius.
Highest temperature: 30-35 degrees Celsius.
Cloudy day, hot sun, high UV index. Cloudy night, no rain.
Da Lat
Lowest temperature: 18-24 degrees Celsius.
Highest temperature: 27-30 degrees Celsius.
The day will have showers and thunderstorms in some places. Cloudy night, no rain.
Ho Chi Minh City
Lowest temperature: 24-27 degrees Celsius.
Highest temperature: 31-35 degrees Celsius.
There will be thunderstorms in some places on the day and the UV index is high. Cloudy night, no rain.
Vung Tau
Lowest temperature: 24-27 degrees Celsius.
Highest temperature: 31-32 degrees Celsius.
Day and night there are thunderstorms and strong winds.
Phu Quoc
Lowest temperature: 26-29 degrees Celsius.
Highest temperature: 29-32 degrees Celsius.
Day and night there are scattered showers and thunderstorms.