A bushfire near Exeter had increased to 157 hectares in size on Tuesday, as crews continued containment work both on the ground an in the air.
The blaze started on Monday afternoon, with investigations into the cause ongoing.
A Tasmania Fire Service spokesman said while the fire was burning on private property, there was no immediate threat to nearby homes.
An advice alert remained in place Tuesday night for Lanena, Rosevears, Grindelwald, Bridgenorth, Legana and Notley Hills residents.
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The fire is burning in relatively inaccessible areas between Rosevears and Exeter, with helicopters involved throughout the day Monday and Tuesday to work on strengthening containment lines and extinguishing parts of the blaze.
Bulldozers were also working to create further firebreaks. Crews have been staged at Brady's Lookout.
Cooler weather conditions Tuesday, including a westerly wind change, had been expected to favourable, the spokesperson said.
Smoke was impacting visibility on the West Tamar Highway on Tuesday, with TFS issuing a smoke alert for Lanena, Rosevears, Grindelwald, Bridgenorth, Legana, Notley Hills and the West Tamar Highway.
The speed limit on the highway was reduced to 60 km/h northbound near Gravelly Beach Road.
Residents are advised to keep their windows and doors closes, as the smell of smoke remains very strong in the area.
People with medical conditions are advised to have a personal plan for avoiding smoke from the burn.
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