Extreme fire behaviour

Characteristics of extreme fire behaviour

  • Fires will likely form large convection columns with winds strong enough to damage buildings and blow over trees restricting access.
  • Occurs from fire behaviour in the surrounding landscape, including where it interacts with the hazard in close proximity to a building.
  • Arises in high risk landscapes, with long fire runs, steep topography and vegetation in a mostly natural state.
  • Influenced by fuel loads and drought conditions.
  • Extreme ember attack will occur.
  • Associated with weather as seen on Black Saturday.
  • Any fire that starts and takes hold will be so intense that life safety may be seriously compromised.

Image of house surrounded by high flames on three sideses

Key consideration for planning decision making:

Places subject to extreme fire behaviour require careful consideration and decision making. The state’s bushfire planning policy at clause 13.02-1S and the need to prioritise life will mean many planning applications in these areas may not be appropriate. If a proposal does proceed strengthened resilience is often required.

Page last updated: 25/01/22