The floods, which began on October 10, have affected millions of people across huge swathes of the country, inundating thousands of homes and leaving authorities struggling to reach people stranded in remote areas.

Authorities in the capital have reinforced flood walls with 200,000 sandbags and are building temporary wooden bridges in 27 communities to help people cross waterlogged streets.

More than 1,000 water pumps are on standby and authorities are preparing schools, monasteries and mosques in 13 districts for evacuation.

"From now on the river level will increase every day, as there is a period of high sea levels," said Veera Wongsaengnak, deputy director general of the Irrigation Department.

Prime Minister Abhisit Vejjajiva said that while floods in the kingdom's east and northeast were receding, the situation in central provinces was a concern, especially with high tides due in the next few days.

The Emergency Medical Institute of Thailand reported a further six deaths to add to Saturday's toll of 32, who were swept to their deaths or killed in accidents as vehicles were carried away by the churning waters.

AFP