At least two people have drowned in the Jukskei River in Bramley Park while being baptised.
It is believed that the congregation was performing the ritual of baptism in the river.
Johannesburg Emergency Services are searching for at least 15 church members also believed to have been washed away by flash floods yesterday.
Operations for search and rescue are still underway, according to EMS spokesperson Robert Mulaudzi.
“The two people drowned while they were attending a baptism. There was also one person who was treated for injuries. We also have about 15 people who are alleged to be missing during this incident.
“We continued our search last night and the search was called off and we will be resuming with our search to continue looking for the alleged 15 people who are believed to be missing”.