Warnings of flash floods and landslides in mountainous areas and localised flooding in low-lying and riverside areas have been issued by the national weather agency.
According to the National Centre of Hydro-MeteorologicalForecasting, at 1 pm on December 18, the storm's eye was about 650km east-southeast of the Binh Dinh-Khanh Hoa coast, with wind speeds sustaining 150-165km per hour near its centre.
It is forecast to move west northwest at a speed of 20-25kmper hour until it reaches the sea area off the coast of Binh Dinh and Khanh Hoa at1pm on December 19, with the strongest wind speeds near the centre of the stormbeing at 135-165km per hour.
In the next 48 to 72 hours, the storm will change directionand move to the northeast, traveling 15-20km per hour and weakening into atropical depression.
From the night of December 18 to December 20, the mainlandof Thua Thien-Hue, Da Nang, Quang Nam, Khanh Hoa, Quang Ngai, Binh Dinh and PhuYen are expected to see strong winds.
In response to the storm, Quang Tri has issued itsevacuation plan, prioritising evacuating nearly 28,000 people on Con Co islandand in four coastal districts of Vinh Linh, Gio Linh, Trieu Phong and Hai Lang.
Meanwhile, facing the impact of bad weather caused by typhoon Rai, Vietnam Airlines decided to cancel flights to and from Quang Nam, QuyNhon and Tuy Hoa on December 19./.