A choked drain in a nearby construction site for the upcoming Upper Thomson MRT station led to the flash flood which put a dampener on the festive mood at several eateries on Christmas Eve.

This was uncovered during investigations by national water agency PUB.

To fix the problem, the Land Transport Authority (LTA) will get the contractor of the worksite to further improve the flow of water in the temporary diversion drain – which acts as a conduit for rain water while drainage upgrading works are ongoing.

“As part of works to construct Upper Thomson MRT station, PUB is also working with LTA to upgrade the drain along Upper Thomson Road to enhance flood protection for the area,” the authorities told The Straits Times.

PUB has also reminded construction-industry players to conduct checks on the public drains in the vicinity of their respective construction sites in preparation for the monsoon season. The flash flood incident took place last Saturday at a row of shops between Jalan Keli and Jalan Todak near Thomson Plaza.

It was not just soaked diners who had to wade through knee-high waters after rain water flooded the eateries.

About eight businesses along Upper Thomson Road were affected by…