The main hospital in Honiara, Solomon Islands, faces a looming and costly relocation, with seawater already lapping at its foundations, as the frontline health impacts of climate-driven sea-level rise become an urgent reality.
Dr Saia Ma’u Piukala, the World Health Organization’s regional director for the western Pacific and a former Tongan health minister, witnessed the threat firsthand last November. He described plans to move the facility to higher ground as a “massive and costly undertaking” that should never have been necessary. His warning underscores a crisis far broader than one building: across 14 Pacific island nations, 62% of all health infrastructure lies within 500 metres of the coast.
A cascading health catastrophe
The vulnerability of hospitals and clinics is just one facet of a deepening health emergency. Rising seas contaminate freshwater sources, leading to waterborne diseases, while changing ecosystems can expand the range of mosquitoes, increasing the threat of vector-borne illnesses like dengue and malaria. Saltwater intrusion into agricultural land devastates crops, exacerbating food insecurity and malnutrition.
Furthermore, the chronic stress of losing homes, livelihoods, and ancestral land to encroaching water inflicts severe mental health burdens, a condition sometimes termed solastalgia. These impacts fall hardest on the most vulnerable—the elderly, children, pregnant women, and marginalised communities with the fewest resources to adapt or flee.
The scale of the crisis was emphasised at the inaugural UN general assembly meeting on sea-level rise, where representatives of small island developing states described it as a global threat to 1 billion people. Samoa’s then prime minister, Afioga Fiamē Naomi Mataʻafa, captured the profound injustice, stating, “We contributed almost nothing to this global scourge but it is our land that is being consumed by the sea.”
The Lancet Commission’s profound challenge
In response to this escalating threat, a Lancet Commission on Sea-Level Rise, Health and Justice has been convened. Co-chaired by the former UN climate chief Christiana Figueres, it brings together nearly two dozen experts in health, environment, law, and economics. Its mandate is to confront not only the medical consequences but also the pivotal question of justice and financial accountability.
Central to its work is one of the most difficult issues in climate politics: who should pay when cities like Honiara are forced to rebuild critical infrastructure damaged by sea-level rise? The commission must grapple with the ethical and legal dimensions of assigning responsibility to the historically largest polluting nations and corporations.
This involves examining existing international environmental law, the emerging legal landscape around climate liability, and the adequacy of current financial mechanisms like the Green Climate Fund and the Loss and Damage Fund. The challenge is to translate the moral argument, so powerfully voiced by island nations, into a viable framework for compensation and support.
For Dr Piukala, a surgeon and commissioner on the Lancet body, the evidence is unambiguous. “The consequences of inaction are now too severe to ignore,” he says. “The evidence of climate‑related health harm is overwhelming and irrefutable. As both a doctor and a former health minister, I firmly believe that health is ultimately a political choice.”
