Milder conditions have allowed firefighters to control scores of blazes across Tasmania but some rugged parts of the state continue to burn uncontained.
Thousands of dry lightning strikes over recent days sparked numerous fires but authorities were claiming a small victory on Thursday.
Tasmania Fire Service Chief Officer Chris Arnol said 20 fires had been contained while 50 continued to burn.
"Our strategy of hitting these fires hard and fast with aircraft ahead of ground crews where access allows, continues to be successful," he said.
"We have used today's milder conditions to make significant headway in reducing the risk these fires pose.
"This brief respite has been vital ahead of expected worsening fire weather conditions over the coming weekend."
Mr Arnol said Tasmania's fire services were at "maximum capacity" and they needed help from interstate in the form of at least 80 firefighters on top of the 50 already on secondment.
"Those personnel will be needed in the areas that we have been working in, that is, those remote fire tactics," he said.
"We will also be asking for some specialist fire behaviour analysts .. they will help us plan and project what we need to deal with these fires longer term."
There are numerous fires burning in close proximity in far southwest Tasmania which are being monitored by aerial patrols.
The Parks and Wildlife Service remained focused on evacuating bushwalkers from high-risk areas using helicopters.
The state's major fires remain a blaze which has burnt more than 20,000 hectares of wilderness near Gell River northwest of Hobart since it started on December 28 and another near Lake Fergus in the state's centre.
Both are considered uncontained but pose no immediate threat to life or property.
The Bureau of Meteorology reported only a couple of millimetres of rain in a few places across Tasmania on Thursday, with a front due on Friday bringing up to 5mm of rain and winds.
"Five millimetres of rain unfortunately is not helpful to firefighters ... it just makes roads slippery and things more difficult, it doesn't put the fires out," Mr Arnol said.
Temperatures and winds are expected to build over the weekend and peak by mid-next week.
