Firefighters are having to trek for two hours to reach a remote wilderness blaze in Tasmania that has been burning for weeks.
The uncontained Gell River bushfire has burned through about 20,000 hectares northwest of Hobart since it was sparked by lightning strikes more than a fortnight ago.
Specialist firefighters are working in rugged terrain and have to walk a four-hour return trip to tackle hotspots, the Tasmanian Fire Service said on Monday.
The weather is being monitored by authorities and contingencies have been put in place in case of outbreaks.
"This involved setting up sprinklers around several huts of historical significance and deploying crews to protect critical communications infrastructure," Parks and Wildlife controller Shane Breen said.
Hotspots near the fire edge are being continuously extinguished but it would only take one ember to land in vegetation and start a new fire, he added.
"That is a real possibility with the elevated fire weather."
The out-of-control fire is 20km northwest of Maydena township and about 7km north of Adamsfield.
An advice alert remains in place for Maydena, Tyenna, Mount Field and National Park and while there is no immediate threat to people in the area, conditions can quickly change.
Interstate firefighters, including those from NSW's Rural Fire Service, are among up to 100 personnel tackling the blaze, along with six aircraft.
