An investigation into a fire in Struisbaai/Bredasdorp, found the source of ignition.
The Agulhas Municipality said more information would be provided later.
The fire led to a temporary closure of the main road, the R319 on Thursday.
It has burnt an estimated 1500 hectares, and is mostly contained.
The Cape Agulhas Municipality said on Friday morning, although the Greater Overberg Fire Protection Association (FPA) has contained most of the aggressive fire lines, teams would focus on dangerous mountain lines that lead to Bredasdorp.
The Municipality also said all livestock was safely taken out of the path of the fire timeously.
No injuries and structure losses were reported.
A backburn was also scheduled on Friday early, when the winds are favourable.