The South African Weather Service said temperatures were expected to rise from warm categories to a 60% chance of showers and thunderstorms.

Weather forecaster Tokelo Chilane said this was due to summer systems, which position themselves in the afternoon and summer thunderstorms.

“The dominant weather systems from Monday onwards will be a surface trough located over the central interior as well as an upper atmospheric system which will pass through western parts of the country, but as it moves from west to east, it will cause disturbances over the eastern and southern interior, leading to isolated showers (30%) to scattered rain showers and thunderstorms (60%).

“The affected provinces will be the Free State, North West, Eastern Cape, Gauteng, KwaZulu-Natal, Mpumalanga and Limpopo.”

SAWS issued a warning last week of a heatwave in Limpopo, Mpumalanga, Gauteng and the Free State, excluding the western and southern parts and the eastern northwest.

The forecasted three days of continued high temperatures will begin Saturday and are expected to end Monday.

Chilone said the current heat wave could extend into Tuesday in the northeast of the country.

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