Shelters housing people affected by a fire in the Cleveland informal settlement were destroyed by the storm.
Several other informal settlements have also been partly flooded and some roads are inaccessible in the south of the city.
Mulaudzi said, “We advise young children to stay away from any areas that might be flooded. Stay away from drains and any other rivers and streams to avoid drowning. Obviously from our side, we will remain on high alert. People in our informal settlements are the hardest hit.”