BEIRA, Mozambique: Cyclone Idai and its aftermath affected around 1.85 million people in Mozambique alone, U.N. humanitarian agency OCHA said.

Aid workers have raced to fathom the scale of the disaster, local media reports said.

OCHA coordinator Sebastian Rhodes Stampa said several will be in critical, life threatening situations.

Cyclone Idai destroyed houses provoking widespread flooding near the Mozambique port city of Beira on March 14. The cyclone then ripped through Zimbabwe and Malawi.

Around 686 people have been killed by the storm and its aftermath in three countries. (Agencies)