Tasmania Fire Service chief officer Gavin Freeman said on Tuesday that crews continued to battle fires in the state's North-West, North and South-West this week, with the ongoing help of interstate and overseas resources.

More than 50 remote area firefighters remain on the frontlines in those regions, along with pilots from New Zealand in the South-West.

"I'm very comfortable with the resources we have on these fires," Mr Freeman said in his weekly social media address.

"It's just not a quick process. Be patient with us as we do the very best we can to make sure we have all these fires declared out."

A massive fire south-west of Mawbanna, in the state's North-West, remains of concern to residents in the Balfour area.

Underground hotspots continue to plague firefighters on the ground in the Mersey Forest, south-west of Mole Creek.

The bushfire along Gordon River Road, Mount Cullen, west of Hobart, has also proved difficult to access and control, TFS said.

"Progress continues to be made on securing fire edges, however there are still remote hotspots of fire to be accessed to the east of the fire perimeter and south of Gordon River Road," the service said in a statement.

"Vehicle-based crews will continue to secure areas of the fire that are accessible boundaries by vehicle. The greatest area of smoke activity is directly adjoining the west of Mount Wedge. This activity is unlikely to burn any additional great areas under current weather conditions, as the fire is generally locked in by wetter vegetation."

Eight water-bombing helicopters are present in that area.

Last weekend, the service said it hoped it may be able to scale back its interstate resources in the coming weeks, and allow people to re-enter their fire-ravished communities.