President Filipe Nyusi feared the death could well be 1,000 in Mozambique in the wake of Cyclone.
"For the moment we have registered 84 deaths officially, but when we flew over 1,000 deaths, he said.
So far the total death toll has risen to at least 215 after the storm tore into central Mozambique Zimbabwe and Malawi, bringing flash floods and ferocious winds.
At least 126 people were killed in Mozambique and Malawi, according to the Red Cross and Zimbabwe's information ministry on Monday
Most of the deaths in Mozambique occurred in the central port city of Beira, 90 percent of which was destroyed, according to the International Federation of Red Cross and Red Crescent Societies (IFRC) .
A large dam burst on Sunday in the city, cutting off the road to the city of about 530,000 people, the IFRC said in a statement.
"The scale of damage caused by Cyclone Idai that hit The Mozambican city of Beira is massive and horrifying, "it said.
The cyclone destroyed 90 percent of Beira, according to the Red Cross [1
The IFRC warned that the death of the devastation is known, with further heavy rains expected. Hundreds are missing and more than 1.5 million people have been affected by the widespread destruction and flooding.
"First came ferocious winds and torrential rain that lasted almost four days ago." Al Jazeera's Malcolm Webb, reporting from central Mozambique.
"The damage is extensive even 300km [from the cyclone’s landing area] where we are." Hundreds of houses are destroyed in this district alone. "
Euloge Ishimwe, the IFRC's Africa region communications manager, told Al Jazeera of Kenya's capital Nairobi that the shelters were "immediate needs, but healthcare, clean water supply and sanitation, and high priorities."
"These are some of the things we are trying to do Mozambique Red Cross volunteers are already on the ground as well as the IFRC's international team, "he said.
In Zimbabwe, across the eastern and southern parts of the country, a government official said
Chimanimani district has been cut off from the rest of the country by 170km of traffic
Chimanimani, many of whom have been sleeping in the mountains since their homes were flattened by rock falls and mudslides or washed
The Cyclone Eline devastated the eastern and southern parts of the country Zimbabwe in 2000.
The United States of America's Humanitarian Agency Says 5.3 Million People Wants to Demand Food Aid.
|Chimanimani district has been cut off from the rest of Zimbabwe [Tony Saywood via Reuters]|
Al Jazeera and news agencies