The South African Weather Services (SAWS) has issued a warning for severe thunderstorms that may occur over large parts of Gauteng and other provinces.
The weather bureau says the adverse weather conditions are expected to develop over parts of the North West and Free State spreading to Gauteng, parts of Limpopo and Mpumalanga from Thursday evening.
It says the stormy weather will continue overnight into Friday morning.
The weather service says thunderstorms may result in large amounts of small hail, damaging winds, heavy downpours and localised flooding.
“Yellow level 2 warning of severe thunderstorms which will result in strong damaging winds, hail and rain that might lead to flash flooding over the eastern parts of the Free State, south-western Bushveld of Limpopo, Gauteng, south-western parts of Mpumalanga and western KwaZulu-Natal, which may result in damages to informal settlements, disruption of municipal services (telecommunications and power supply) until the early morning.”
Motorists have been urged to exercise extreme caution when driving on the roads during the thunderstorms.