Britain has now pledged hundreds of millions of rands worth of humanitarian aid to help stop what it calls an escalating humanitarian crisis in Syria.
Relief groups are stepping up their appeals for aid to tackle the worsening food crisis in the Sahel region where more than 18-million face hunger.
US special envoy to Sudan, Princeton Lyman, wants South Africa to pressure Khartoum to allow international aid groups into two conflict-hit regions.
Libyan rebels are facing a new battle by struggling to provide Tripoli's residents with water, electricity, petrol and food.
Soon, Southern Sudan's humanitarian disaster could dwarf that of its neighbour Darfur.
Fears were mounting on Friday of a new humanitarian disaster in Darfur after Sudan ordered the expulsion of aid agencies.
Rebels clashed on Friday with a pro-government militia in eastern DRC as a United Nations envoy held talks with guerrilla chief Laurent Nkunda.
Opposition leader Morgan Tsvangirai on Wednesday rebuffed pressure to agree to join a unity government with President Robert Mugabe.