The power of a prophet's prayer holds a profound ability to alter harsh decrees, capable of transforming strict justice into mercy. Through sincere pleading, a devastating judgment can be reversed. This reversal is an absolute and completed action [אבן עזרא, רד״ק], reflecting a definitive shift in divine intent [מצודת ציון]. It is as if God reconsidered the harsh decree [מצודת דוד], becoming appeased and withdrawing the punishment [ביאור שטיינזלץ]. The primary approach among commentators is that in response to the prophet's earnest request, God accepted the plea and canceled the planned disaster.
Yet, a question arises regarding the exact scope of this cancellation. A deeper look reveals that the divine promise to halt the punishment does not mean the disaster was entirely prevented from the start. In fact, the prophet only cried out in prayer after the majority of the crops had already been destroyed. Therefore, God's assurance means that the resulting famine will not lead to the total annihilation of the people. The devastation is allowed to strike, but He ensures it will be firmly stopped just before reaching the point of complete and final ruin [אברבנאל].