SINGAPORE - On December 29, 2024, flash floods impacted several areas in Singapore, including Dunearn Road and Bukit Timah Road, following an unprecedented rainfall event. This incident marked the third occurrence of flash flooding during the ongoing north-east monsoon season, which has recorded the highest rainfall levels since 1980.
On that day, the central region experienced 134.6mm of rainfall, accounting for 41% of the average monthly precipitation for December. This downpour ranked in the top 1% of maximum daily rainfall records since 1978.
The north-east monsoon, coupled with the La Nina climate phenomenon, is expected to prolong the rainy conditions until late January 2025. The Meteorological Service Singapore is currently monitoring the situation under a 'La Nina watch'.
Authorities have been proactive in addressing flood risks, with ongoing drainage improvement projects in flood-prone areas like Bukit Timah. However, the rapid development of rainstorms poses challenges for existing drainage systems, which can be overwhelmed by extreme rainfall.
In response to the flooding, the national water agency PUB assisted affected motorists and property owners, providing flood protection devices and pumping out water from inundated buildings. The Building and Construction Authority (BCA) also assessed structural safety in areas where retaining walls collapsed during the storm.
With climate change contributing to more frequent and intense storms, experts emphasize the need for improved early warning systems and public preparedness for future flooding events.