Up to eleven buildings, including at least two houses, are believed to have been damaged as a bushfire continues to burn out-of-control in the hills southeast of Adelaide.

More than 400 firefighters were working to control the blaze, which has burned more than 2,500 hectares of land and has recorded a fire perimeter of 24km.

South Australia’s Department for Health and Wellbeing has also issued a warning about smoke across the state caused by the bushfires in Cherry Gardens.

The department advised people with chest or heart conditions to stay indoors where possible, avoid physical exercise outdoors and reduce their exposure to smoky air.