Residents walk through a flooded street in Bangkok Nov 5, 2011. [Photo/Agencies]

BANGKOK - Thailand's worst floods have left 506 people dead and 2 missing, Thai Department of Disaster Prevention and Mitigation reported on Sunday.  

The flooding situation has receded in some upstream provinces but still prevails in 25 provinces in northeastern and central regions including the capital Bangkok city, affecting some 1.2 million household or 3.2 million people.

For its parts, 13 out of 50 districts in the capital city have been swamped, putting the inner city at the risk of being flooded. Some 11,000 evacuees are staying at shelters across the city.

The country's worst floods have continued since late July, affecting more than 9.4 million in 64 flood-stricken provinces or over four-fifths of the whole nation. Tens of thousands of factories have been inundated, leaving over 600,000 people on the risk of loosing their jobs.  

The flood-caused damage was estimated at $20 billion to $23 billion if the overall areas in the capital city of Bangkok are submerged. The city's gross domestic product is about $36 billion. Some 20 percent of the city in northern, eastern and western areas has already been swamped and the inner city is likely to be flooded.