Discussion has started about how the 180,000 hectare reserve could be used for future generations, with its lease up in two years.
Six helicopters, 12 fire engines, three tankers and one command unit are at the scene, working to contain the fire.
The warning comes after a fire that ripped through Wanaka hill country was started by someone disposing of hot ashes.
Ben McLean was sentenced to life in prison today at Invercargill High Court for the murder of his wife.
Verity McLean was murdered on Anzac Day by her husband - today he was jailed for life.
In the High Court in Invercargill the 48-year-old was also sentenced to seven years jail for the attempted murder of Garry Duggan.