The United Nations has officially declared a famine in two regions of southern Somalia and warned that without action, famine-level conditions could soon spread to the rest of the south. More than 100,000 Somalians have fled to refugee camps in Kenya to escape the famine, brought on by the worst drought in the Horn of Africa in half a century.

According to Mark Bowden, the UN humanitarian coordinator for Somalia, about half of its population (3.7 million people) is in crisis and about 10 million people in the Horn of Africa region are at risk for famine. Somalia is worst-off because of perpetual government instability and the threat of Islamist militant group Al Shabab, which have made delivery of aid challenging, CNN reports.

Mr. Bowden appealed for more aid on Wednesday, saying that the UN would need $300 million in the next two months to provide an adequate intervention.

The following is a handful of organizations seeking donations to funnel to the Horn's crisis: