Between 27 March and 07.00 on Tuesday, 1,428 cholera cases entered the treatment units.
The disease is spreading rapidly, Unicef said.
As floodwaters start receding, authorities warned of a "second disaster" from cholera and other diseases, which transmits through contaminated food and drinking water.More news: Album Review: Billie Eilish showcases haunting vocals on anticipated debut record
Cholera, an acute diarrheal disease, can kill within hours if it is not treated. Many people in accommodation centers told the media of losing relatives as they fled the rising flood waters. Now there are 1,428, a lot of them in the hard-hit port city of Beira, which has been the hub of relief efforts since Cyclone Idai roared in on March 14.
Organized by the Office for the Coordination of Humanitarian Affairs (OCHA), in collaboration with the Department of Economic and Social Affairs (DESA), WFP and the UN Development Programme (UNDP), the aim of the special ECOSOC meeting was to update Member States on Cyclone Idai's impact across Mozambique, Zimbabwe and Malawi. Issa, cited by the independent television station STV, said that when the victim reached a Dondo health unit, he was already fatally dehydrated, and the staff were unable to save him.
Monday's count of cholera cases had been 1,052.More news: Manitoba will challenge federal carbon tax in court
Five-hundred beds in seven cholera treatment centres across the affected area have been set up by Unicef, WHO, and partners, along with the provincial directorate of health. By Tuesday, 598 people had been confirmed killed by the cyclone in Mozambique alone while Zimbabwe government reported its toll to have climbed to 268 - taking the toll to 866 between the two countries. The number has been called very preliminary and the real toll may never be known, with some people quickly buried or washed away.
Almost 900,000 doses of the cholera vaccine procured by the United Nations Children's Fund (Unicef) and the World Health Organization (WHO) have arrived in Beira, Mozambique and the vaccination campaign will begin imminently, Unicef said.
The Mozambique Red Cross has been on the ground even before Cyclone Idai struck and continues to support more than 200,000 people across the disaster zone.More news: Brexit: How Would the Plastics Industry Have Voted 'Indicatively'?