Every effort will be made to save the Mount Buffalo Chalet as the out of control Abbeyard fire powers towards the Alpine region.
Ovens deputy incident controller Jarrod Hayse said a line of fire retardant surrounded the chalet ahead of tonight's unpredictable fire conditions.
"We are actively protecting critical infrastructure on Mount Buffalo including telecommunications and also the Mount Buffalo Chalet," he said.
"We are using things including large air tankers and also have firefighters on the ground protecting the chalet."
Despite assuring the community "every effort" would be made to save the old building, Mr Hayse said the weather was unpredictable.
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"These are extreme fire conditions and the lives of our firefighters and the community must come first," he said.
The areas of concern are in the Buffalo and Buckland valleys.
"For the past week we have had watch and act messages out for our community and we have been really supported by our community in heading our advice to leave early," Mr Hayse said.
The Ovens Incident Control Centre, which is also under a watch and act message, has 211 firefighters on the ground with 12 aircrafts operating.
There were also 70 items of equipment including excavators working throughout the day.
The Abbeyard fire has a perimetre of more than 180 kilometres that is mostly out of control. Only one home has been confirmed lost.
Firefighters from the United States arrived in Ovens today and will be deployed to the fireground tomorrow.
The Defence Force are also helping the incident control centre.