January 08, 2018, 12:28 PM 
A Volvo car turned into a submarine along Upper Changi Road on Jan. 8, 2018.
This was after heavy thundery showers fell over almost all parts of Singapore on Monday morning, resulting in massive ponding, which is more commonly known as flash floods.
Water levels in several waterways, such as Sungei Tongkang, Sungei Kallang and Bedok Canal, were close to being full.
The PUB issued "high flood risk" alerts for them.
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Stalled vehicles
A video posted online showed the Volvo submarine stalled, with another Mercedes submarine in the opposite direction being abandoned by its owner in knee-high flood waters:
Video:
[video width="640" height="800" mp4="https://static.mothership.sg/1/2018/01/volvo-submerged.mp4"][/video]
This is how Upper Changi Road looks like normally:
This is how Upper Changi Road looks like when very wet:
Other parts of Singapore flooding
In a video of the area taken from another angle, a swimming pool was temporarily formed as motorists took to the roads to divert traffic in what is essentially a canal:
(Editor's note: This Instagram post was incorrectly geotagged as being in Ayer Rajah, but it's been pointed out to us that the video was likely taken in the same area).
This car was engaged in water-skiing:
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