Heavy rain coupled with full high tide caused the flooding to take place around noon.
Jalan Wong Ah Fook and several roads leading to Johor Baru City Square and Komtar JBCC shopping malls were flooded.
Floodwaters rose to as high as 1.5 metres in some places, and at least 20 cars were trapped.
They helped at least 3 people trapped in their cars at Jalan Wong Ah Fook.
By about 2pm, the floodwaters began to recede.
Fortunately, no casualties have been reported.
The flooding comes after Johor warned that the water levels in two of its major dams remained below critical level, sparking concerns in Singapore about the state of our water supply from Johor.