A search will resume for a missing bushwalker last seen on Boxing Day after the deployment of specialist search-and-rescue crews, as temperatures climb and a bushfire burns in the area.
Hadi Nazari, 23, has not been seen since about 2.30pm on December 26 when he began descending the Hannels Spur trail in the Kosciuszko National Park near Geehi, between Khancoban and Thredbo.
Two friends reported him missing when he did not arrive at the campground where they planned to meet.
Rubbish and hiking poles believed to have belonged to Mr Nazari were found on Tuesday but there has been no sighting of him despite the ongoing search efforts.
Specially trained volunteers camped overnight as other experts were winched in by aircraft to search at the weekend, with hot and humid conditions adding to the difficulty of searching the rugged terrain.
More than 300 people have been involved in the search operation, NSW Police said.
A multi-agency search has involved members of NSW National Parks and Wildlife Service, SES and NSW Ambulance along with police and volunteers.
Some 36 people were in the park searching for Mr Nazari on Sunday, assisted by two aircraft.
Temperatures reached 37C at Geehi on Sunday afternoon with a milder top of 28C forecast on Monday.
A fire in the national park near Hannels Spur was brought under control by Sunday afternoon with an alert area of some 40 hectares.
The Hannels Spur trail, with its 1800m elevation change, is regarded as one of Australia's most difficult bushwalking routes.
