How do eucalyptus trees help bushfires spread?

The eucalyptus oil in the leaves of a eucalyptus tree can reach excessive temperatures, literally exploding the crown of the tree, sending sparks flying. Other trees do not explode like this. At these higher elevations (high up in the tree) where the tree crown tends to be exposed, the wind gusts generated by the flames are more intense, and the sparks and flaming branches and leaves will spread further to other bushland.