According to the National Center for Hydro-Meteorological Forecasting, the hot low-pressure area in the West is developing and expanding towards the Southeast.
On May 16th, the western mountainous region from Thanh Hoa to Phu Yen experienced hot weather with maximum temperatures of 35-37 degrees Celsius, and even exceeding 38 degrees Celsius in some areas; the lowest relative humidity was 45-60%. The Northern Delta, southern Son La , Hoa Binh, and Southern Vietnam also experienced hot weather with maximum temperatures of 35-36 degrees Celsius, and exceeding 36 degrees Celsius in some areas; the lowest relative humidity was 45-65%.
From May 17th, the Northwest region and the area from Thanh Hoa to Phu Yen will experience more intense heat with maximum temperatures of 35-38 degrees Celsius, and in some places exceeding 39 degrees Celsius; the lowest relative humidity will be 40-55%.
In the northeastern region of Vietnam, the heat is less intense, with maximum temperatures of 35-37 degrees Celsius, and even exceeding 37 degrees Celsius in some areas; the lowest relative humidity is 45-60%.
In addition, the Southern region is still experiencing hot weather with temperatures reaching 35-36 degrees Celsius, and even exceeding 36 degrees Celsius in some areas; the lowest relative humidity is 45-65%.
According to meteorological forecasts, from May 18-23, the Northwest region and the area from Thanh Hoa to Phu Yen will continue to experience intense heat, with temperatures ranging from 36-38 degrees Celsius, and exceeding 39 degrees Celsius in some places.
On May 18th, temperatures in the Northeast region will also rise to 35-37 degrees Celsius, with some areas exceeding 38 degrees. From May 21st to 23rd, the hot and intensely hot weather will continue. Specifically, from the night of May 18th to 20th, the mountainous areas will experience scattered showers and thunderstorms in the evening and at night; the lowlands will experience localized heatwaves.
The hottest hours are mainly concentrated between 11 am and 5 pm. Meteorological experts warn that, due to the combined effects of the heat, low humidity, and southwest winds causing a Foehn effect, there is a risk of explosions and fires in residential areas due to increased electricity demand, and a risk of forest fires.
In addition, hot weather can cause dehydration, exhaustion, and heatstroke in the human body when exposed to high temperatures for extended periods.
For Southern Vietnam, the heat will gradually subside from May 18th. From May 18th to 25th, there will be showers and scattered thunderstorms in the afternoon and evening, with localized moderate to heavy rain.
Source







