SINGAPORE - She was on her way to the university when she received a picture from a friend on her mobile phone.
It showed the science faculty block at the National University of Singapore flooded, with water up to the knees.
Rainwater even cascaded off higher floors into the basement, like a waterfall.
"I was shocked and decided to turn back home and return to school later," said Ms Tammy Ng, 19, an undergraduate.
Thursday's heavy morning downpour over the central and western parts of Singapore caught many by surprise.
It flooded a stretch of the Ayer Rajah Expressway (AYE) towards East Coast Parkway (ECP), with waters reaching a depth of half-a-metre and forcing all four lanes of the expressway to be closed. Traffic came to a standstill.
According to national water agency PUB, the flood waters subsided within 40 minutes.
Flash floods were also reported at the junctions of Commonwealth Drive and Commonwealth Avenue, Alexandra Road and Delta Road, Lorong Kismis, South Bridge Road and Maxwell Road, and Cuscaden Road and Tomlinson Road.
Along Dunearn Road, a large tree fell on two cars, causing a massive jam. Luckily, no one was injured, reported The Straits Times online.