SINGAPORE — With climate change expected to cause more erratic rainfall patterns, Singapore's approach to dealing with flash floods has been expanded, said national water agency PUB chief executive Ong Tze-Ch'in.The Government will continue to invest in drainage infrastructure, but on top of that, PUB recognises the need to build up societal resilience against flash flooding, he added.«We have come to the realisation that we cannot possibly prevent every flooding event,» said Ong, 50, in an interview with The Straits Times on Nov 28, as the country enters the rainy north-east monsoon season — the wettest period of the year.According to Singapore's third national climate change study, the growing amount of planet-warming gases in the atmosphere is expected to bring heavier, more intense and frequent storms.In January, monsoon surges — weather events that happen during the wet phase of the north-east monsoon — dumped large amounts of rain over the country in a short period of time. Read more