Authorities in Mozambique say death toll from Cyclone Idai, which tore through southern Africa more than a week ago, rose sharply on Saturday.
The Mozambique Land and Environment Minister Celso Correia said the number of people declared dead rose from 242 to 417.
The new figure puts the overall death toll at about 700 people across Mozambique, Zimbabwe and Malawi.
However, the toll is expected to rise further.
The storm has killed at least 259 people in Zimbabwe, while in Malawi 56 people died when heavy rains hit ahead of the cyclone.
But the United Nations said officials will only be able to determine the final casualty figure once the flood waters have receded.
Thousands of people are still awaiting rescue from flooded areas across in southern Africa
The UN Office for the Co-ordination of Humanitarian Affairs (OCHA) said on Saturday that the Buzi and Zambezi rivers were at risk of breaking their banks again.