At least 115 people were killed in Mozambique, Malawi and South Africa after heavy rains hit 843,000 people in South East Africa, said United Nations and United Nations officials, calling for emergency calls.
At least 66 people were killed in Mozambique, 45 in Malawi and four in South Africa after heavy rains that led to floods.
Mozambique's spokesman Ana Comoana said that "the government has issued a red alert because of the continuing rains and the approach of tropical cyclone Idai, which is expected to reach the country between Thursday and Friday."
She spoke with reporters late Tuesday on a Cabinet meeting in Maputo to discuss the emergency.
The flooding in Mozambique, one of the poorest countries in Africa, has already destroyed 5 756 homes, affecting 15 467 households and 141 325 people.
In neighboring Malawi, floods have affected more than 230,000 people without shelter and 739,000 people, according to the United Nations.
Malawi's meteorological department warned of further rains and floods in the south of the country between Thursday and Sunday.
In Mozambique, 111 people were injured, 18 hospitals destroyed, 938 classrooms destroyed and 9,763 students affected.
More than 168,000 hectares of grain were destroyed, the government spokeswoman added.
The local authorities have ordered the forced evacuation of people living in flood-prone areas.
"In the provinces of Sambezia and Tete, 16 tourist accommodation centers were opened to house the displaced persons," said Comoana.
"The government needs 1.1 billion meticais ($ 16 million) to help 80,000 families affected by the rains."
Mozambique is prone to extreme weather events. Floods in 2000 claimed at least 800 lives and killed more than 100 people in 2015.
"Tropical Cyclone Idai, which had formed over the Northern Mozambique Channel on 9 March, is expected to land near Beira (East Mozambique) on 14 or 15 March," said the United Nations Office for the coordination of humanitarian affairs.
"The cyclone hit the Mozambique Channel on March 12 and is expected to return to the state of intense tropical cyclones (category 4 equivalent) before landing."
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