Footage from Bargo, a town 100km (62 miles) southwest of Sydney, shows firefighters driving their engine down a road with the inferno on both sides.
Five firefighters were reportedly rushed to hospital after sustaining injuries battling the Bargo blaze, which has left a trail burnt out buildings and vehicles in its wake.
Australia is currently locked in the grip of a heatwave with the country experiencing its hottest day on record on Tuesday when the national average temperature hit 40.9C (105.6F), according to Ruptly.