A heartbreaking image has emerged of a firefighter pouring water on a koala to keep it cool as bushfires ravage Victoria. 

A Benalla Fire Brigade member was photographed helping the koala as it rested on a tree while thick smoke rose in the background.

The dramatic image has captured the intensity of the bushfire season, which has been labelled the worst since the 2019 Black Summer bushfires.

The infernos have left one person dead, at least 390,000 hectares scorched, and over 300 structures reduced to rubble. 

Several fires have been downgraded to Watch and Act, but authorities are still trying to control a number of blazes.

Despite the downgrades, those caught up in the fires were warned the cool change that swept through the eastern states on Sunday morning would not necessarily bring relief, because erratic winds were complicating firefighting efforts.

There are still 15 emergency warnings related to three fires in different parts of Victoria.

'Strong south-westerly winds may cause the situation to change at any time,' a Vic Emergency warning said.

A firefighter pours cool water over the head of a distressed koala in Victoria on Sunday

Other states are providing crucial help in the battle to contain the blazes with a contingent of 20 Western Australian firefighters now in Victoria after flying out of Perth on Sunday morning for a seven-day mission to help Victorian colleagues.

Emergency Services Minister Paul Papalia said WA's help was much appreciated.

'Victorians are in peril, and Western Australians are stepping forward to help. It's really heartening,' he said.

'These people are the best of Western Australians, stepping forward with no notice to go the other side of the country to help their fellow countrymen and women in their time of need.'

There are two major fires with emergency warnings – the Walwa blaze in the state's north-east and a fire in the Otways region.

The massive Longwood fire has been downgraded to a Watch and Act.

On Sunday afternoon, Victoria Police confirmed that human remains were found about 100m from a car at the Longwood bushfire area, near the Victorian town of Seymour. 

Meanwhile, Victorian Premier Jacinta Allan slammed 'fire tourists' for travelling to bushfire-ravaged towns to gawk at the devastation.

A burnt-out property that was destroyed in the Longwood fire

The bushfires have destroyed about 350,000 hectares of land in Victoria

Allan condemned sightseers entering fire-flattened towns and delivered a sharp message: 'Stay away.'

'It is wrong to go into these fire grounds where it's unsafe and you don't belong there, and you'll be dealt with by Victoria Police,' she said.

Emergency management commissioner Tim Wiebusch echoed her frustration, revealing that authorities had already intercepted unwanted visitors in restricted areas.