The National Centre for Hydro-Meteorological Forecasting reported that hot weather was recorded in the western mountainous areas stretching from Thanh Hoa to Hue on June 1, where maximum temperatures generally ranged between 35°C and 36°C, with some locations exceeding 36°C.
The heatwave is expected to expand across the Red River Delta and southern Phu Tho Province from June 2. Maximum temperatures are forecast to reach 35–36°C, with some areas experiencing temperatures above 36°C.
During the same period, the north-central and central regions are also likely to experience hot weather, with some areas facing severe heat. Temperatures are expected to range from 35°C to 37°C, with certain locations surpassing 37°C.