Prescribed burns are being planned around the Eyre Peninsula by the National Parks and Wildlife Service as part of the spring burning program.
A prescribed burn planned for today at Bascombe Wells Conservation Park is now underway.
Communications officer for Natural Resources Eyre Peninsula Katrina Pobke said prescribed burns can only go ahead when weather conditions are within the required prescription.
"National Parks and Wildlife Service fire management staff have been liaising closely today with the Bureau of Meteorology and the CFS, per normal prescribed burning procedure," she said.
"Fire management staff will remain onsite until it is safe to leave."
The burn planned for today was expected to start at 11am and be completed by midnight.
It will affect about 400 hectares about 10 kilometres south-west of Lock.
Burns are also planned for Lincoln National Park and private land at Mount Hope.
Prescribed burns are only carried out when safe to do so and may be cancelled at short notice and rescheduled when better weather conditions are predicted.
NPWS fire management officer Aaron Macumber said the program will begin as soon as weather conditions are suitable.
"We are constantly looking for the right weather conditions to conduct prescribed burns and working closely with the Bureau of Meteorology," he said.
Mr Macumber said many of these burns can create significant smoke, which is normal in mallee vegetation.
"Prescribed burns create fuel-reduced areas to limit the spread of bushfires in strategic areas," he said.
"While these planned burns help to reduce the risk and impact of bushfire, it is important that people also take measures on their own properties."
The burns will be planned and carried out by NPWS and the Country Fire Service.