The United Nations says 24 people are confirmed dead and 3,300 have been displaced by Cyclone Pam in the South Pacific archipelago of Vanuatu.

The U.N. Office for the Coordination of Humanitarian Affairs said in its latest report Monday that radio and telephone communications with outer islands have not yet been established.

OCHA said the 3,300 people are sheltering in 37 evacuation centers on the main island of Efate and in the provinces of Torba and Penama.