One person has died and 300 properties have been destroyed in bushfires that have torn across south-east Australia.

The fires have raged in dozens of locations across the country for several days, mostly in the state of Victoria, but also in New South Wales, burning through land almost twice the size of Greater London.

A state of emergency has been declared in Victoria as thousands of firefighters and more than 70 aircraft battle the blaze. Residents in more than a dozen communities have been advised to leave their homes.

Authorities fear the fires, which are being fuelled by very hot, dry and windy conditions, could burn for several weeks.

Victoria's Premier Jacinta Allan reported that 30 active fires were burning across the state, with 10 being of particular concern. She noted that as of Sunday morning, 350,000 hectares had already been burnt.

Human remains were discovered in the village of Gobur, near Longwood, with officials stating that the identity of the victim has yet to be confirmed.

Firefighter Tyrone Rice, who lost his home in Harcourt while battling the fires, described the devastation, stating that the loss was a profound emotional blow.

Authorities warn that this is among the worst bushfire seasons since the catastrophic fires of 2019-2020, raising serious concerns about air quality and community safety across the region.