Natural florest fires Can lead to deforestation because when its occurs on a large scale (small-scale fires are a common occurence in some florests and can help organic cycling in the ecosystem) the fire tends to spread quickly and cruelly, destroying vagatation, killing organisms and the protective layer of the soil. In addition the fire can be harmful to the river and aquatic animals by provoking a increase in the water temperature. After the first impact that is the destruction of living being, the natural fire causes a increase in general temperature and climate changes in the florest environment as a consequence of this event.