Is God commanding Eliyahu his loyal servant - to decree a drought, or is Eliyahu - more zealous than God himself - issuing a decree that God agrees to?  As each year of drought passes, each scene describes an intensification of the famine alongside a miracle involving Eliyahu. If Eliyahu has decreed a famine in his zeal for God, the progression in the chapter expresses God's desire for Eliyahu to express some compassion and to rescind the decree. If Eliyahu was operating on God's command, the progression describes the development of Eliyahu as a prophet during the famine period. 

Courtesy of the Virtual Beit Midrash, Yeshivat Har Etzion