Tasmanian Bushfires: People Told To Evacuate As Flames Reach Their Most Dangerous

Tasmanians are bracing for a morning of severe fire risk, with residents in south and central parts of the state being told to leave their homes.

The hazard hit its peak from 5 am on Friday, with temperatures in the high 30s and wind gusts of up to 90km/h likely to fan dozens of fires already burning across the state.

Eight new fires started on Thursday, adding to 50 others across the state, with two-thirds considered uncontained. Some 64,000 hectares of land has been burned.

"The best thing people can do in these conditions is leave early," the Tasmania Fire Service warned on Thursday.

Conditions are set to reach their worst on Friday. Image: AAP

"A fire under the expected conditions can move very quickly with the potential for embers starting fires up to 20 kilometres ahead.

"Even those whose homes are well prepared to defend against fire will find their property is not defendable in these conditions."

Adding to the challenge for fire crews on Friday, forecast winds mean water-bombing aircraft will be grounded.

READ MORE: Fires Threaten Lives In Central Tasmania

READ MORE: 'We Are Not Out Of The Woods': Bushfires Ravage Tasmania and Victoria

Ground crews will be stepped up to try and cover the loss of aircraft but efforts will be prioritised in terms of human safety and property defence.

A burnt out property near Miena, Tasmania. Image: AAP.

Several fires have the potential to threaten communities. A blaze at central Great Pine Tier could bear down on Shannon, Waddamana, Hilltop and Penstock Lagoon and the Gell River fire southwest of Hobart - which has been burning since December 28 - could reach Geeveston.

One house has been lost near central Miena, while residents remain on alert at Barren Tier, Zeehan, Rosebery, Lynch Hill, Tods Corner, Penstock Lagoon, Tahune Airwalk and Liawenee.

A state-wide fire ban is in place until Monday.