The National Center for Hydrometeorological Forecasting warned that from the night of August 18, in the Northern region , Thanh Hoa and Nghe An there would be scattered showers and thunderstorms in some places, with heavy rain in some places with rainfall from 10 to 10 meters. 30mm, locally over 50mm. The highest temperature of the day decreased slightly to 32 degrees Celsius.
From August 19, a new low pressure trough formed, the Northern region's weather returned to rain and lasted until August 22, with some places forecasting heavy to very heavy rain.
The Central region continues to maintain hot weather, with severe heat in some places. The western low pressure area tends to become more active, the hot sun area expands to Thanh Hoa with the highest daily temperature of 36-38 degrees Celsius, in some places above 38 degrees Celsius.
The area from Quang Binh to Ninh Thuan has the highest temperature from 35-37 degrees Celsius, with some places above 37 degrees Celsius; The lowest relative humidity is commonly 50-55%. Particularly in Thanh Hoa - Ha Tinh provinces, the heat is milder due to scattered showers and thunderstorms.
The Central Highlands and the South are in the rainy season, so even though it is quite sunny during the day, there is still a chance of cool thunderstorms in the evening.

Hanoi
Lowest temperature: 26-28 degrees Celsius.
Highest temperature: 32-34 degrees Celsius, in some places above 34 degrees Celsius.
Cloudy, with scattered showers and thunderstorms, with heavy rain in some places. Light wind. During thunderstorms, there is a possibility of tornadoes, lightning and strong winds.
Northwest
Lowest temperature: 24-27 degrees Celsius, in some places below 24 degrees Celsius.
Highest temperature: 31-34 degrees Celsius, in some places above 34 degrees Celsius.
Cloudy, with scattered showers and thunderstorms, with heavy rain in some places. Light wind. During thunderstorms, there is a possibility of tornadoes, lightning and strong winds.
Northeast
Lowest temperature: 25-28 degrees Celsius.
Highest temperature: 31-34 degrees Celsius, in some places above 34 degrees Celsius.
Cloudy, with scattered showers and thunderstorms, with heavy rain in some places. Light wind. During thunderstorms, there is a possibility of tornadoes, lightning and strong winds.
Thanh Hoa - Thua Thien Hue
Lowest temperature: 26-29 degrees Celsius.
Highest temperature: 35-37 degrees Celsius, in some places above 37 degrees Celsius.
Cloudy, in the evening and at night there will be showers and thunderstorms in some places, especially in Thanh Hoa tonight and tomorrow afternoon there will be scattered showers and thunderstorms in some places, locally there will be heavy rain; Hot days, some places are extremely hot. Light wind. During thunderstorms, there is a possibility of tornadoes, lightning and strong winds.
Da Nang to Binh Thuan
Lowest temperature: 25-28 degrees Celsius.
Highest temperature: 35-37 degrees Celsius, in the North there are places above 37 degrees Celsius.
Cloudy, showers and thunderstorms in some places in the evening and night, hot days, intense heat in some places. Southwest wind level 2-3. During thunderstorms, there is a possibility of tornadoes, lightning and strong winds.
Central Highlands
Lowest temperature: 21-24 degrees Celsius.
Highest temperature: 29-32 degrees Celsius.
Cloudy, showers and thunderstorms in some places in the evening and night, sunny days. Southwest wind level 2-3. During thunderstorms, there is a possibility of tornadoes, lightning and strong winds.
Southern region
Lowest temperature: 24-27 degrees Celsius.
Highest temperature: 32-35 degrees Celsius.
Cloudy, showers and thunderstorms in some places in the evening and night, sunny days. Southwest wind level 2-3. During thunderstorms, there is a possibility of tornadoes, lightning and strong winds.