Mozambique began three days of national mourning after Cyclone Idai killed hundreds and left a massive trail of destruction across southeast Africa.
Powerful winds and flooding hit Mozambique's port city of Beira on Thursday before moving inland where it flattened buildings and put millions of lives at risk.
Mozambique's President Filipe Nyusi said in a televised statement on Tuesday that the cyclone had killed more than 200 people in Mozambique, with the death toll expected to rise.
In neighbouring Zimbabwe, the official death count stands at 98 but is likely to grow with hundreds of people still missing.
Rescue crews are struggling to reach victims while aid groups say many survivors are trapped in remote areas by damage and flooding.
"Challenges remain in terms of the search and rescue of thousands of people, including children," UNICEF said.
It estimated that 260,000 children were at risk in Mozambique. The Red Cross has said at least 400,000 people have been made homeless in central Mozambique alone.
The European Union announced on Tuesday an initial emergency aid package of 3.5 million euros ($A5.6 million) while Britain has also pledged aid.
