Deputy Prime Minister Vuong Dinh Hue was assigned to direct flood relief work in the two localities.
Earlier, PM Nguyen Xuan Phuc sent a letter to rescue forces, soldiers and locals in the flood-hit provinces, expressing his sympathy with them and asking all-out efforts to deal with the consequences of the floods.
He ordered local authorities to take measures to help communities get back on their feet soon.
In early September, torrential rains brought by a tropical depression were recorded from Nghe An to Thua Thien-Hue. In many areas, total rainfall rose to over 1,000mm, causing widespread flooding in low areas, leading to heavy loss in human lives and property.
As of September 5 evening, the death toll due to flooding rose to six while 10 others remained missing in the provinces.
The hardest-hit localities were Ha Tinh, Quang Binh and Quang Tri.