Intelligence Analysis
Australia: Bushfire Summer Forecast 2025
18 DEC 2025
/
2 min read
Author
Intelligence Analyst I

Key Takeaways:
- For the 2025 summer period, the risk of bushfire activity is elevated in western and southern Australia, north-central New South Wales, and southwest, western, central, and north-central Victoria.
- Bushfire activity may periodically disrupt transportation services due to evacuations, road closures, and ground transport diversions based on fire activity and the needs of response operations.
- Businesses are likely to be adversely affected by supply chain disruptions caused by bush fires, especially if they require the transportation of perishable goods.
Bushfires are integral to the Australian environmental landscape. Many native plants are fire-prone, and some depend on fire to regenerate. Bushfires start when dry fuels – such as leaf litter and other organic debris – encounter an ignition source, which may be lightning or human activity. The rate of spread and intensity of fires are influenced by wind speed, ambient temperatures, slope angle, amount of fuel available, and fuel moisture levels.
The bushfire season typically runs December-May in southern Australia, May-October in northern Australia, and August-March in central Australia. Southeastern Australia, including southeastern South Australia, Victoria, and southern New South Wales, is one of the most fire-prone areas worldwide.
Bushfire Forecast by Region
The conditions in the various regions of Australia are as follows:
- New South Wales
Central regions are carrying high grass fuel loads and are entering summer drier than normal. With no clear indication of increased rainfall to alleviate these conditions, the area is likely to face an increased risk of fast-moving, intense fires. - Victoria
An increased risk of fire is forecast for southwest, western, central and north-central regions, as well as south-west Gippsland January-February. A warmer-than-average summer is likely. Despite current green growth, Victoria is likely to rapidly transition to a highly flammable state in January. - Western Australia
Elevated fire risk is expected for Yalgoo and the Geraldton Sandplains due to above-average surface fuel accumulations. This increased risk also applies to the northern parts of Swan Coastal Plain and Jarrah Forest, and parts of Esperance Plains and Mallee region due to persistent soil moisture deficits. With a forecast for a warmer-than-average summer, vigilance and property preparation are crucial.
Bushfire Health Impacts
Bushfires can result in loss of life, widespread property damage, economic losses, and infrastructure impacts. Power outages may occur due to direct fire damage to infrastructure or pre-emptive safety shut-offs to reduce fire risks. Smoke from bushfires can cause eye irritation, respiratory discomfort, and worsen chronic heart and lung diseases. Individuals with pre-existing respiratory illnesses such as allergies, asthma, or chronic obstructive pulmonary disease (COPD) may experience heightened symptoms. Extensive soil erosion is possible across burn scars during rainfall due to loosened soil and an increase in runoff from the lack of vegetation cover.
Bushfire Business Impacts
Supply chain disruptions are possible, especially if bushfires burn across highways, roads, or approach large population centers. This could lead to evacuations, road closures, and ground transport diversions due to fire activity and the needs of response operations. Disruptions to arterial roads are possible, and the scarcity of alternative routes in some areas can result in significant transport disruptions. While authorities are experienced in minimizing the potential impact, roads in remote regions are likely to be disrupted for longer periods than urban roads due to their relative inaccessibility. Also, even after evacuation orders are lifted, reentry periods may continue to impact traffic flows. Low visibility from smoke and possible ashfall could contribute to traffic delays and congestion and prompt short-notice flight disruptions if bushfires occur near airports. Railways can also experience occasional cancellations of services and extended delays.
Bushfire activity in the upcoming peak months is likely to cause localized disruptions across parts of Australia, especially in areas where above-average fire activity levels are forecast. Severe fires could lead to casualties, damage, and evacuations. Those operating in the region should remain vigilant for bushfire outbreaks and ensure adequate contingency plans are in place to respond to the threat of fires in the coming months.
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