The relevant authorities are required to closely monitor the tropical storm and promptly implement response measures, especially in preventing fishing vessels, cargo ships and tourists ships from going out to sea.
He also asked the local governments to evacuate the people if necessary, ensure the safety of aquafarming facilities, stockpile food and other necessities in areas prone to being isolated by rain and flooding and operate reservoirs and hydropower plants appropriately.
As of 7am on November 23, the storm was located at about 410 kilometres to the east of Phan Rang and 610 kilometres to the east of Vung Tau, with wind speeds of between 75 and 90 kilometre per hour.
Usagi is moving in the west-southwest direction at a speed of 10-15 kilometres per hour and could gain further strength over the next 24 hours, with landfall forecast on November 25 in south-central and south-eastern provinces.
Earlier on November 22, the Central Steering Committee on Disaster Prevention met with the leaders of 14 provinces and cities likely to be affected by Usagi to discuss measures to deal with the tropical storm.
At the conference, Deputy PM Trinh Dinh Dung recalled the tremendous losses inflicted by Typhoon Damrey, which hit Vietnam in late 2017, as a danger warning and urged the relevant authorities to take earnest efforts in preparation for Usagi.