A base camp for more than 350 firefighters, including 200 officers from Fire and Rescue NSW stations, has been set up at Sydney's Olympic Park.
As part of the makeshift operational base set up at the sporting ground, NSW firefighters will bunk down in the change rooms at Skoda Stadium.
A contingent of mechanics, engineers and logistic support staff are also at the base camp, which also accommodates 120 fire trucks.
Among the officers on hand are FRNSW's newest recruits, who have only been in the job for five weeks and are helping with NSW's worst bushfires in decades.
The base camp was set up by urban search and rescue specialists using the same resources deployed during the Japan Tsunami and Christchurch earthquake in 2011.
FRNSW said in a statement FireAir1 would also be deployed to Skoda Stadium on Wednesday to prepare for worsening fire conditions.
"The Sydney Olympic Park base of operations is part of one of the largest mobilisations of fire engines and fire officers in the history of the organisation," FRNSW said in the statement.
A similar Rural Fire Service base camp is also in place at the Penrith Panthers Club and will accommodate 800 personnel.