Sea-Level Rise: A Present-Day Global Health Crisis

Sea-level rise has transitioned from a technical projection for engineers and planners into an immediate public health crisis. The phenomenon is actively damaging human bodies, minds and the essential infrastructure required to maintain health and wellbeing across low-lying coastal regions and small island states.

The scale of the crisis is significant, with representatives of low-lying countries and small island developing states stating at the inaugural UN general assembly meeting on sea-level rise in 2024 that the issue threatens 1 billion people worldwide.

Direct Impacts on Health Infrastructure

The physical threat to healthcare facilities is already manifesting in vulnerable regions. In Honiara, Solomon Islands, seawater has been observed lapping at the outer walls of the main hospital.

Dr. Saia Ma’u Piukala, a surgeon and the World Health Organization’s regional director for the western Pacific, has noted that the facility is now under threat. This has necessitated plans to relocate the hospital to higher ground, a process described as a massive and costly undertaking.

Broadening Health Burdens

The health burden driven by rising seas extends beyond the physical destruction of clinics and hospitals. A new Lancet Commission on sea-level rise, health, and wellbeing reports that the advancing waterline is reshaping daily life for hundreds of millions of people, amplifying existing health inequities and driving new patterns of disease.

Specific health risks associated with sea-level rise include:

• Water Contamination: Health suffers when saltwater intrudes into freshwater supplies.
• Infectious Disease: The spread of diseases increases when floods overwhelm sanitation systems.
• Food Insecurity: Nutrition deteriorates when farmland is inundated by king tides.
• Mental Health: Displacement and the prospect of leaving ancestral lands create a complex mix of emotional, cultural, spiritual, and financial harm.

The Inequity of Climate Health Impacts

There is a profound disparity between those responsible for the drivers of sea-level rise and those suffering its health consequences. Christiana Figueres has described the climate health impacts as the mother of all injustices.

Those facing the earliest and harshest consequences are, overwhelmingly, those who did the least to create them

Christiana Figueres

In regions such as Vanuatu, coastal erosion and sea-level rise are cited as huge threats. The crisis is no longer an abstract challenge measured in centimeters, but a present-day reality that erodes the social, cultural, and ecological foundations of health.

Beyond the medical and biological impacts, the loss of safety, dignity, continuity, and belonging is identified as a critical component of the health crisis facing these communities.