The number of house severely damaged or destroyed now stands at 26 confirmed, plus other buildings. The number may yet rise.
Thirteen homes have been destroyed in the worst bushfire in South Australia since 1983.
That number is expected to rise to more than 30 homes as specialist crews of firefighters assess the damage in the Adelaide Hills and try to control the blaze, which has been burning since Friday, the Australian Broadcasting Corporation (ABC) reports.
But it is a race against time as weather conditions are expected to hamper efforts on Wednesday, with high temperatures and winds expected.
More than 1,100 properties lie in the affected area and authorities say they will have a better idea of the damage as the day goes on.
Fire crews are working to protect pockets of homes from the blaze and will increase their efforts to control the fire from the air.