Speaking to the International Food Policy Research Institute, Clinton said the US is providing another $17 million in food aid to the Horn of Africa. That brings total US assistance to the region to more than $580 million.

The UN says the crisis has not peaked. The drought has been exacerbated by the Islamic militant group Al-Shabab, which refuses to allow many aid groups into areas of Somalia it controls. Thousands of children have died.

Clinton said the famine must prompt long-term thinking to help avert future food crises. She spoke of boosting agriculture, nourishment levels and food distribution networks.