At one time the UN machine was honestly looking at the flooding problems in Asia without blaming global warming.
The real problem is poverty and over development of flood plains. Notice the dates of the reports mentioned predate the global warming hysteria.
Another UN report in 2007 came to same answer. Overdevelopment.
http://www.jstor.org/discover/10.2307/3059653?uid=3739800&uid=2&uid=4&uid=3739256&sid=21101456760307Even in 2012 there is no mention of global warming at the more honest UN agencies.
"95% of urban population growth takes place in informal settlements with poor housing infrastructure, and on lands of last resort that range from railway tracks, coastlines, and flood plains to river banks and volcanic slopes - locations all highly exposed to hazards."
http://www.unescap.org/speeches/reducing-vulnerability-and-exposure-disasters-asia-and-pacific 
