Meanwhile, floods which affected Africa in late 1997 led to upsurges of cholera, malaria and Rift Valley fever.

CNN: Global warming may harm human health

After years of neglect, the country's infrastructure is melting away, public-sector employees are dissatisfied, epidemics of other, more visible diseases such as cholera and Rift Valley fever abound.

ECONOMIST: AIDS in Kenya

You know, there was an outbreak of Rift Valley Fever and some rains in the Horn of Africa, and that's a symptom of more rainfall activity out over the Western Indian Ocean.

NPR: Can Climate Change Explain Odd Weather?