You can reduce or increase the size of all non-magical fires within the area of effect (but not to exceed area – you cannot make a fire expand beyond the 60-foot burst of the spell) until the spell is dismissed, expires, or available fuel runs out. To extinguish a fire completely exhausts the spell. An affected fire’s heat production and fuel consumption change accordingly with size. Magical fires or creatures composed of fire (such as fire elementals) are not affected by fireshape.