BANGKOK - A total of 657 people were confirmed dead and three other were missing in the floods that had inundated the upper part of Thailand for about four months, the Disaster Prevention and Mitigation Department reported on Thursday.

Five more people were confirmed dead on Wednesday in central provinces of Nakhon Patom and Suphanburi.

Ayutthaya has the highest death toll where 139 people were killed by floods, followed by Nakhon Sawan where 72 people were killed.

Floods have been caused by the heavy monsoon "Nock-Ten" and overflow from several dams in upper part of the country since mid- July.  

On Thursday, floods still prevail in 15 of 77 provinces and are affecting about 4.8 million people from 1.8 million households.  

The flood have affected about 4.0 million households and about 13.4 million people in 64 of 77 provinces since July 25.