The ICG/CARIBE EWS is comprised of the following:
- Member States of the IOC from the Caribbean and Adjacent Regions;
- Observers from other IOC Member States;
- Invited observers from other organizations (including non-governmental organisations), programmes and projects in accordance with the IOC rules and procedures.
Member States

Antigua and Barbuda

Aruba

Bahamas

Barbados

Belize

Brazil

Canada

Colombia

Costa Rica

Cuba

Curaçao

Dominica

Dominican Republic

France (Martinique, Guadeloupe, St. Martin, Guyane, St. Barthelemy)

Grenada

Guatemala

Guyana

Haiti

Honduras

Jamaica

Mexico

Netherlands (Bonaire, Saba, Sint Eustatius)

Nicaragua

Panama

Saint Lucia

St. Kitts and Nevis

St. Martin

St. Vincent and the Grenadines

Suriname

Trinidad and Tobago

United Kingdom (Anguilla, British Virgin Islands, Bermuda, Cayman Islands, Montserrat, Turks and Caicos)

United States (Puerto Rico, US Virgin Islands)

Venezuela (Bolivarian Republic of)
Observers from other IOC Member States
Observers from other IOC Member States with designated tsunami warning focal points (TWFP) are Canada and Peru.
Observer Organizations
Caribbean Disaster Emergency Management Agency (CDEMA)
Caribbean Institute for Meteorology and Hydrology (CIMH)
Coordination Centre for the Prevention of Natural Disasters in Central America (CEPREDENAC)
Puerto Rico Seismic Network, University of Puerto Rico, Mayagüez (PRSN)
Seismic Research Centre, University of the West Indies, Trinidad and Tobago (SRC)
United Nations Development Programme, Barbados and the OECS (UNDP)
World Meteorological Organization (WMO)