To support the efforts without purchasing the pack, you can donate directly to the Australian Red Cross and/or the NSW Rural Fire Service.
From now until the end of the month, Call of Duty: Modern Warfare developer Infinity Ward is donating all proceeds from its Outback Pack DLC to the Australian wildfire crisis.
“From everyone at Infinity Ward, Call of Duty and Activision, thank you for your consideration.
Activision’s donation includes any sales made before the charity drive was announced right up until the end of January, and includes sales sold across PC, PlayStation 4, and Xbox One.