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The Guardian says -

The current drought conditions in the Horn of Africa have been caused by successive seasons with very low rainfall. Over the past year, the eastern Horn of Africa has experienced two consecutive failed rainy seasons. According to surveys of local communities, this is part of a long-term shift. Borana communities in Ethiopia report that whereas droughts were recorded every six to eight years in the past, they now occur every one to two years.

Is climate change to blame for famine in the Horn of Africa?

Bucko says -