Fire Danger Rating

The Wildland Fire Danger Index (FDI) is used for estimating the potential for a fire to start and the required suppression action on any given day. The index has 5 categories:

  • Low: Fuels don’t ignite quickly from small firebrands. Weather and fuel conditions will lead to fires spreading slowly, with low intensity.
  • Moderate: Fires can start from most accidental causes, and with the exception of lightning fires, most start slow. Fires are not likely to become serious and easily to control.
  • High: Dead fuels ignite readily and fires start easily from most causes. Fires may become serious and difficult to control if they aren’t stopped when small.
  • Very High: Fires start easily from all causes and quickly spread, increasing in intensity. Both stopping and controlling the fires requires more effort and time.
  • Extreme: Fires start quickly, spread fast and burn intensely. All fires are potentially serious and have the chance to be extreme and have erratic behavior.