At what stage of fire development does the fire's heat release rate become primarily limited by the amount of available fuel and oxygen, rather than the fire's own growth?

The fire's heat release rate, which is the rate at which thermal energy is generated by combustion, becomes primarily limited by the amount of available fuel and oxygen, rather than the fire's own growth, during the fully developed stage. During the preceding growth stage, the fire's heat release rate increases significantly as the fire expands, involving more combustible materials. This stage often culminates in....