Northernand central provinces started to experience hot weather from May 7 withthe highest temperatures ranging from between 32-37 degree Celsius.
"Thisis the first hot spell of the year, which has come later than usual andis not as severe as the hot spells of last year," said the centre'sdeputy director Le Thanh Hai.
"The regions are forecast toexperience about six or seven hot spells this year, but the heat wavewill be less severe than previous years as a result of La Ninaphenomenon," he added.
The hot weather is expected to drop tobetween 27-30 degrees Celsius in the middle of this week as a result of amonsoon spell from China, he said.
"The monsoon will cause heavy shower in some areas," Hai said.
"However,the next hot spells are forecast to hit northern and central regions inthe next two months resulting from a strong foehn wind in the lowpressure area."
Foehn winds are caused by a rapid subsidence ofmoisture in the air after crossing mountain ranges, where moisturecondenses, leaving a severe, dry wind, he explained.
"It is very hot and dry," he stressed.
Hot weather is expected to last until August.
Lastyear, the regions experienced two record severe hot spells in mid-Juneand July with temperatures topping more than 45 degree Celsius.
Meanwhile,Aere, the first tropical storm hitting the East Sea this year, waspositioned over the south-east of Philippine's Luzon Island at 7am onMay 9 with wind gusts of between 75-88km per hour, according to theforecast centre.
The storm is expected to cause rough seas and strong winds in the north-eastern region of the East-Sea.
TheCentral Steering Committee for Storm and Flood Prevention and Controlhas urged provincial authorities from Quang Ninh to Phu Yen to informvessels operating in the East Sea of the position and progress of thestorm.
They are asked to keep a close watch on the progress ofthe storm and prepare rescue forces, vehicles and equipment to be readyto cope with emergency cases.
The Border Guard High Commandreported that 44 vessels with 539 crew from the central coastal provinceof Quang Ngai that are operating off the Hoang Sa (Paracel Islands)have received storm warnings./.