A NSW Rural Fire Service spokeswoman said six crews were also fighting the grass fire on ground, which had burned through about 16 hectares in the vicinity of Leppington Public School on Rickard Rd.
More than 600 firefighters have been deployed and conditions are being closely monitored, but a southerly change forecast on Saturday afternoon is a concern among authorities.
THE Rural Fire Service (RFS) is remaining vigilant after a busy few weeks fighting fires in the Bathurst and Lithgow regions.