Then Minister for the Environment and Water Resources Yaacob Ibrahim said that flooding was a freak event that "occurs once in 50 years" after the Bukit Timah canal burst its banks after a downpour, resulting in parts of Bukit Timah being submerged. However since then, we have been seeing more flooding occurrences in Singapore.
On 10 Nov 2018, flash floods struck parts of Bukit Batok and Choa Chu Kang. Many pictures started surfacing on social media. You can see some of the photos here posted by netizen Ian Chung:
Do you still think it's a once in 50 years occurrence?