Heavy rains in Mozambique and South Africa have killed more than 50 people and left around 100,000 people homeless. Twenty-seven people are reported to have been killed in Mozambique and 30 in South Africa.

Large areas in the south of Mozambique - including parts of the capital, Maputo - have turned into swamps. Maputo is isolated and the entry into the city is impossible.

There are reports of shortages of clean drinking water and food supplies. The South African air force has been helping relief efforts in the whole area. Officials said helicopters and boats were picking up people clinging onto trees and on rooftops.

Health authorities have warned of possible outbreaks of malaria and cholera in the region. Mozambican President Joaquim Chissano said his government would formally appeal to the international community for assistance.

In South Africa, tens of thousands, many of them in poor rural areas, have had their homes destroyed. Many are now sheltering in hospitals and community centres.

In Alexandra township, just north of Johannesburg, several homes were partially swept away when the Jukskei river burst its banks, and residents were evacuated.