Non-stop rain over the past few days has blocked roads, submerged houses and crops and forced the closure of dozens of schools in central provinces.
In Ha Tinh Province, heavy rain has triggered floods which have totally isolated 22 communes in Huong Khe, Vu Quang and Duc Tho districts.
Floodwater has inundated several stretches of national road 15A, which connects Huong Khe District to National Road 1A. One stretch of the road, through Ha Linh Commune, is under four meters of water.
Heavy rain and storms also unroofed 22 houses in Ky Giang Commune in Ky Anh District and submerged thousands of hectares of crops.
Authorities have temporarily closed all schools in Vu Quang District, 20 schools in Huong Son District and 23 schools in Huong Khe District.
Nearly 500 households in low-lying areas were evacuated in case of flashfloods and landslides in the next few days.
Local authorities Thursday forecast more heavy rains, which could worsen floods in Ha Tinh Province. Emergency crews were mobilized to protect areas under flood threats, including La Giang Dike and Ke Go, Boc Nguyen, Song Rac and Kim Son lakes.
In Quang Binh Province, heavy rain on Wednesday night inundated all entrances to the center of Le Thuy District and several communes along National Road 1A in Le Thuy and Quang Ninh districts.
Le Thuy People's Committee reported heavy rain had flooded 11,000 houses, 34 schools, 18 medical centers and nine markets.
More than 82,000 people were without clean water, with vast sections of roads and dikes damaged, the People's Committee said.
In related news, local authorities in Quang Nam Province said all roads affected by weekend floods and landslides had reopened. However, more landslides were possible because heavy rain was continuing in the area, officials said.
In Quang Nam's Tay Giang District, heavy rain and water overflowing from the reservoir of A Vuong Hydroelectric Plant caused the collapse of several houses at the residential area of Alua and Kala in Dang Commune.