Former UN Climate Chief to Lead Lancet Commission on Sea-Level Rise and Health

Christiana Figueres, a former UN climate chief and key negotiator for the 2016 Paris agreement, has been appointed as the co-chair of a new Lancet Commission dedicated to investigating the intersection of sea-level rise, public health, and social inequality.

The commission aims to analyze how the advancing waterline is altering daily life for hundreds of millions of people and the specific ways it creates escalating threats to wellbeing. Announced on April 7, 2026, the initiative will focus on the uneven nature of these health risks and the legal frameworks necessary to hold countries accountable for the resulting harms.

The Health Crisis of Rising Seas

Sea-level rise is described by the commission as a health crisis that amplifies existing inequities and drives new patterns of disease. The physical encroachment of the ocean into human settlements creates a cascade of public health challenges that extend beyond simple flooding.

According to the Lancet Commission, the primary health burdens driven by sea-level rise include:

• Contamination of drinking water supplies.
• Increased prevalence of infectious diseases.
• Heightened food insecurity.
• Forced displacement of entire communities.
• Worsening mental health outcomes.

These impacts are not uniform globally. The rise is higher than global averages in the Pacific, influenced by ocean currents, weather patterns, and changes in gravity resulting from melting ice sheets. Island nations such as Fiji, Kiribati, and Tuvalu face the possibility of becoming uninhabitable within decades.

Infrastructure and Institutional Vulnerability

The threat to health is not limited to individual patients but extends to the critical infrastructure required to provide medical care. In the Solomon Islands, the main hospital in Honiara has seen seawater lapping at its outer walls.

The facility is now under threat, with plans under way to relocate it to higher ground – a massive and costly undertaking.

Dr Saia Ma’u Piukala, WHO regional director for the western Pacific

Beyond the Pacific, low-lying cities in other regions are also identified as being under threat, including London and Cardiff in the UK, Amsterdam in the Netherlands, and New Orleans in the US.

Geopolitical Instability and Accountability

Figueres has linked these health crises to a global dependence on fossil fuels, which she claims is driving both geopolitical instability and the environmental changes causing sea-level rise. She has described the health impacts of climate change as the mother of all injustices and warned that countries are being held hostage by their reliance on these fuels.

The commission is designed to influence policy by examining how to hold polluters accountable for the health crises they precipitate. This follows a 2024 UN general assembly meeting where representatives from low-lying countries and small island developing states characterized the issue as a global crisis threatening 1 billion people.

The Lancet Commission, which includes nearly two dozen health and environment experts, is scheduled to deliver its full report by September 2027.