According to the National Center for Hydro-Meteorological Forecasting, the weather forecast from the night of May 18 to May 20 is that the North and Thanh Hoa will have moderate rain, heavy rain and scattered thunderstorms on the night of May 18, locally very heavy rain, then scattered showers and thunderstorms.
From May 20, there will be showers and thunderstorms in some places.
North and Central Central regions: sunny day, hot weather in some places, May 20 is likely to have widespread hot weather; showers and thunderstorms in some places in the late afternoon and night, especially Nghe An on the night of May 18 will have moderate rain, heavy rain and thunderstorms, locally very heavy rain in some places.
Other areas will have showers and thunderstorms in some places in the evening and at night, especially the Central Highlands and the South on the evening of May 20 will have scattered showers and thunderstorms in some places; sunny day.
People and tourists need to be on guard during thunderstorms with the possibility of tornadoes, lightning and strong gusts of wind. Prepare measures against sunburn, heatstroke and dehydration during the day if you plan to travel or visit outdoors.

Weather forecast for tomorrow in Hanoi
Lowest temperature: 24-26 degrees Celsius
Highest temperature: 31-33 degrees Celsius, some places above 33 degrees Celsius
Cloudy; moderate rain and thunderstorms at night, locally heavy rain; cloudy day, scattered showers and thunderstorms. Light wind.
Weather forecast for tomorrow in the Northwest
Lowest temperature: 23-26 degrees Celsius, some places below 22 degrees Celsius
Highest temperature: 31-34 degrees Celsius, some places above 34 degrees Celsius
Cloudy weather; moderate rain, heavy rain and scattered thunderstorms at night, locally very heavy rain; scattered showers and thunderstorms during the day.
Weather forecast for tomorrow in the Northeast
Lowest temperature: 23-26 degrees Celsius, mountainous areas below 22 degrees Celsius
Highest temperature: 31-34 degrees Celsius, some places above 34 degrees Celsius
Cloudy at night, moderate rain, heavy rain and scattered thunderstorms, locally very heavy rain; cloudy day, scattered showers and thunderstorms.
Weather forecast for tomorrow in Thanh Hoa to Hue
Lowest temperature: 23-26 degrees Celsius
Highest temperature: 32-35 degrees Celsius, some places above 35 degrees Celsius
Cloudy; showers and thunderstorms in some places in the evening and at night, especially in Thanh Hoa - Nghe An, there will be moderate rain, heavy rain and thunderstorms at night, locally very heavy rain; sunny day, some places are hot.
Weather forecast for tomorrow in Da Nang to Binh Thuan
Lowest temperature: 24-27 degrees Celsius
Highest temperature: 32-35 degrees Celsius, some places above 35 degrees Celsius
Cloudy; showers and thunderstorms in some places in the evening and at night; sunny during the day, some places are hot.
Weather forecast for tomorrow in the Central Highlands
Lowest temperature: 20-23 degrees Celsius
Highest temperature: 31-34 degrees Celsius, some places above 34 degrees Celsius
Cloudy; showers and thunderstorms in some places in the evening and at night; sunny during the day.
Weather forecast for tomorrow in the South
Lowest temperature: 24-27 degrees Celsius
Highest temperature: 32-35 degrees Celsius
Cloudy; showers and thunderstorms in some places in the evening and at night; sunny during the day.