More heat waves will hit cities and provinces across Vietnam this summer, and the temperature may reach 40 degrees Celsius (104 degrees Fahrenheit), the national weather forecast service has said.
Le Thanh Hai, deputy director of the Central Hydrometeorology Forecast Center, said the first heat wave of summer is hitting all parts of the country, especially the northern and central regions.
The average temperature of the first heat wave this time of year is 35-37 degrees Celsius, and peaks at 38.4 degrees Celsius.
Hai said the country may see six to seven more heat waves this year and the temperature may reach the record of 39-40 degrees Celsius.
"The heat wave we're going through is not the hottest one," he added.
He predicted the hottest month of this year will be June.