Tourists sit on a tricycle taxi called a 'tuk-tuk' as they travel along a flooded street at Phranakhon district in Bangkok October 24, 2011. Thailand is struggling with its worst flooding in 50 years, which has affected a third of its provinces and could swamp more of its densely populated capital, Bangkok, if water flowing from the north and heavy rain cause canals to burst their banks. [Photo/Agencies]

A Bangkok city policeman directs traffic as cars drive along a street flooded from the overflowing Chao Phraya river at Phranakhon district in Bangkok October 24, 2011. [Photo/Agencies]