Thai Prime Minister Yingluck Shinawatra has declared Bangkok's central business district safe from floods.
In a weekly radio and television address from Bali, where she is attending regional summits, she said the drainage of floodwaters in the western part of the capital was progressing slowly.
"It's certain that the inner zone of Bangkok will be safe from floods, as the measures to hold floodwaters have been successful," Ms Shinawatra said.
Radio Australia reports she said she was confident that a key road linking the city to the country's south would not be cut.
The Department of Disaster Prevention and Mitigation said on Saturday that 595 people have been killed in the floods to date.