Officials have warned of more rain as videos and photographs show the deadly impact of flooding in Thailand and Vietnam.

Cars appear almost completely submerged as various parts of the southeast-Asian countries were battered by extreme weather.

The death toll from the heavy rain which has been blighting parts of Vietnam for the past week now stands at 91, while 11 others remain missing.

The weather caused severe flooding and landslides from Quang Tri to Lam Dong provinces, a stretch of 800km.

A total of 63 people were killed in Dak Lak, the worst-hit province, with most deaths caused by drowning.

Khanh Hoa, Lam Dong, Gia Lai, Danang, Hue and Quang Tri provinces also saw fatalities.

Pham Thu Huyen, one of many hundreds of residents and visitors who helped clean up debris in Nha Trang, a popular tourist destination in Khanh Hoa province, said: "We've never experienced that much rain and such bad flooding."

In Thailand, nearly two million people were affected by severe flash flooding in the south of the country over the weekend.

Five were killed and four were injured across six southern provinces, according to regional health officials.

Ten southern provinces have been hit with heavy rainfall over the last week, and officials warned Monday that water levels are expected to rise further with the rain expected to continue through Tuesday.

The city of Hat Yai, a major economic hub in Songkhla province, was hit with 335 millimeters (more than 13 inches) of rain on Friday, the highest 24-hour figure in 300 years, officials said.