Fire-fighters tackled dozens of bushfires burning across Victoria and South Australia on Monday (February 10) that have destroyed at least 26 homes.

There are no reported deaths or injuries despite the ferocity of the fires, local media reported.

Around 6,000 firefighters were mobilised to help deal with what was described as the worst fire situation for five years, reports said.

At least 28 fires are out of control in Victoria and crews are focusing their resources on a fire in Melbourne's northern fringe.

Firefighters are also battling a blaze in South Australia's Flinders Rangers, which is still burning out of control but is no longer threatening homes.