Here you can find an interesting article about the first conflicts climate changes conflicts in Kenya, in 2009: 

The first climate change conflicts - Drought is testing pastoralists and peace in North Kenya

 

(The Guardian, Monday 23 November 2009)

You can find much more material on these issues on the CCAPS website.

The CCAPS ( Climate Change and African Political Styability) is a research center that deals with the relationship between the growing threat of climate change and the ability of African countries to manage complex emergencies, including humanitarian disasters and violent conflict.