The Klipsruit Valley Road in Orlando West, Soweto has been closed off to traffic due to flooding.
Several roads in and around the Johannesburg city have been closed due to the cycle challenge that is taking place on Sunday.
Authorities have urged motorists to exercise caution as the Soweto Marathon is currently under way.
Johannesburg Metro Police are investigating an incident of a physical fight between one of their own and a member of the public.
Four people have been killed and at least 15 others were injured in a multi-vehicle collision on the M1 highway near the Xavier off-ramp, south of Johannesburg.