Observing past bush fire events Having discussed bush fires above, it may be useful to learn about areas that have experienced fires. In fact, certain observations may indicate that fires are still in progress. If you observe recently burnt twigs or ash passing overhead, it may indicate precipitation from the smoke of a major bush fire upwind. Blackened areas of forest indicate recent bush fires. The length of time from the event of the fire to the time of observation is indicated by the amount of regenerated growth on trees and new undergrowth.
Precipitation increases the rate of regeneration.
Therefore, until precipitation occurs, regeneration will be slow. It normally takes a few years for forests to fully regenerate although severe fires can permanently scar some forested areas.