Traffic is backed up in the Johannesburg area and surroundings following heavy down pores.
Several bridges particularly those in low lying areas have been flooded and traffic lights are not working.
The N1 north bound in Fourways is experiencing high traffic volumes approaching the William Nicole off-ramp.
Traffic lights on Main and Bryanston drive as well as William Nicole and Bryanston drive are not working causing heavy delays. A bride on Bryanston drive linking the Fourways area and Morningside has also been flooded.
Authorities have warned motorists to be cautious.
Power outages in some northern suburbs, including Northcliff, have been reported. In Melrose, a tree fell onto a car. It was not clear if anyone had been injured.