1) Commonwealth – The area is basically a giant basin, as it is surrounded by higher ground of Holland and Buona Vista. Water is unable to drain directly towards the sea because of the Southern Ridges, and the area is not served by a canal; 2) Farrer Park – This is a low-lying area and the Rochor River is relatively shallow, but the situation has greatly improved through the years; 3) Tanjong Katong – Not only is East Coast neighbourhood near the sea, Meyer Road used to be right by the seafront prior to reclamation in the early 1970s. Because this was already a populated landed estate at the time, there was little that could be done to elevate the area or add more drainage; 4) Sennett – Historically, the area around low-lying Sennett estate in Macpherson is swampland. While the swamp has been filled in, improvements to drainage is limited; 5) Stevens/Balmoral – This is a housing estate dotted with small hills. You won’t notice them because they’re built over, but when it rains heavily the combined runoff to lower-lying areas of the estate could cause flash floods.... Continue Reading