Fire crews will use favourable weather to backburn and strengthen containment lines on bushfires, south of Hobart.
Authorities say smoky conditions are set to continue after the fires that have burned for months flared up, following a hot, dry weekend.
Advice messages have been issued for blazes in the state's south west, with residents warned of increased smoke and fire activity.
Firefighters will use cooler conditions to strengthen containment lines on the Riveaux Road/Tahune Bushfire and backburns will also be done in the Flower Garden Hill and Kermandie River Road, west of Geeveston, areas.
Authorities say the fire and haze is no cause for alarm, but people with medical conditions should have a personal plan for avoiding smoke from the burn.
People travelling in the area are also warned to turn on their headlights and drive slowly.
The smoke and ash is expected to remain visible into Tuesday, particularly around the Huon Valley, southwest of Hobart, after large flare-ups burned through untouched vegetation, the Tasmania Fire Service said.
Residents are urged to stay alert for any changes in conditions.
"Fire agencies and communities have already experienced a very trying bushfire season, and while it may seem that conditions have abated and life is back to normal, the community needs to be aware that we are still battling serious bushfires," the TFS warns.
Hobart is forecast to reach 25C on Tuesday, with up to 10mm of rain, before a cooler top of 17C with possible showers on Wednesday.
