Help famine victims in Africa, Yemen

Famine in South Sudan alone has left 100,000 people on the verge of starvation and almost 5 million people, more than 40% of the country's population, in need of urgent help, aid agencies say.

Somalia needs funds -- and quickly. In addition to drought and famine, diseases, like cholera and measles are spreading.

Here is a list of charities helping to provide food, water and sanitation, health and shelter in the distressed areas:

CNN's Farai Sevenzo and Bryony Jones contributed to this report.