SINGAPORE - A flash flood on Tuesday (Aug 24) morning that caused roads to become impassable in Dunearn Road between Sime Darby Centre and Binjai Park subsided within 40 minutes, said national water agency PUB. But heavy rain is posing a flash flood risk to other areas, including Upper Bukit Timah Road from Hazel Park Terrace to Chestnut Drive, the junction between Woodlands Road and Kranji Expressway, as well as in Sunset Drive and Sunset Way. People should avoid these areas for now, said PUB in a Facebook post. “Due to heavy rain, water levels in drains and canals have reached 90 per cent in these areas,” it added. As for the flash flood in Dunearn Road, PUB said roads became impassable at 10.08am. Its officers were deployed to render assistance. Water levels subsided at about 10.50am. The flood affected bus operations along Dunearn Road for about an hour, including services 74, 151, 154, 157, 170, 174 and 852, according to SBS Transit in a Twitter post. This is the second time this year that a flash flood has occurred in Dunearn Road near Sime Darby Centre. On April 17, heavy rain caused a similar incident. The incidents there come amid ongoing works to widen and deepen the Buki...