The UV index will be at the high-risk level of 6 to 8 in Quang Ninh Province’s Ha Long City, Hai Phong City and the capital city of Hanoi.
Since Wednesday afternoon, a cold air mass has impacted on the Northwestern and North-Central regions. Due to the cold spell's influence, temperatures in Northern mountainous provinces will drop to 14-17 degrees Celsius from Thursday.
Meanwhile, the Southern region will maintain sunny days without rain.
According to the latest weather news, a newly-formed tropical low pressure system is forecast to develop into a storm which will be able to enter the East Sea next week.