The South African Weather Service (SAWS) has maintained its heatwave warning for Gauteng, with extremely hot conditions expected to continue on Thursday.
The alert came into effect on Wednesday, with temperatures forecast to reach 34°C in Pretoria, 33°C in Vereeniging and 32°C in Johannesburg.
SAWS senior forecaster Tokelo Chiloane said cooler weather conditions are expected over the weekend, accompanied by thunderstorms and thundershowers.
Chiloane urged residents to remain hydrated and take precautions to protect themselves against the extreme heat.
She advised residents experiencing water shortages to consider purchasing drinking water where possible to ensure they remain hydrated.
Residents, particularly those working outdoors, were also encouraged to wear protective clothing and limit their exposure to the heat.