The large blaze at Tulka, 12 kilometres south of Port Lincoln in SA, razed the homes as it tore through 2,000 hectares of scrubland, the Country Fire Service (CFS) said.
Extra crews had been called in to help fight the fire, which was burning within containment lines but was yet to be brought under control. Residents had been evacuated.
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"We have about 100 firefighters on the ground," a CFS spokesman told AFP.
"Although it's not posing any immediate threat it still hasn't been controlled."
It was unclear what sparked the fire but it quickly gathered force due to the hot, squally weather, the spokesman said.
Conditions were expected to be milder Monday, favouring fire crews, but South Australia and most other states are anticipating a tough summer with hot and dry weather forecast.
"We've had a lot of rainfall, a lot of growth, a lot of vegetation and we're expecting a very busy fire season as a consequence of that," the CFS spokesman said.
There were no reports of any injuries.
In 2001 a fire caused major damage to the Tulka township, destroying 11 homes and damaging 10 others as it burnt through 14,000 hectares.
The weekend Tulka blaze was one of a number sparked across SA as temperatures soared into the high 30s.
At Avon, north of Adelaide, a fire was brought under control after causing about $150,000 worth of damage, destroying a barley crop, 250 bales of hay, a tractor and fences.
Bushfires at Calpatanna Waterhole Conservation Park, north of Calca and at Yalata on SA's west coast were also brought under control.
But fires at Quorn, in the southern Flinders Ranges, and at Humbug Scrub, in the Adelaide Hills, were still burning.
