A United Nations Special Rapporteur, Catarina de Albuquerque, visits Tuvalu this week to examine human rights in relation to water access and sanitation.
It is the first ever such visit to a South Pacific country by an independent expert from the UN Human Rights Council.
Ms de Albuquerque, who is visiting at the request of the Tuvalu government, says she'll focus on the impacts of climate change on this human right, and explore the current situation in the country, especially in the informal settlements and the outer islands.
She says she will highlight the issue of discrimination against women and children, and the need for participation.
Following the Tuvalu visit, Ms de Albuquerque will travel to Kiribati on a similar fact-finding mission.