The Climate Refugee Crisis: A Global Emergency Hiding in Plain Sight

The village of Carti Sugtupu, perched on a narrow strip of land off Panama’s Caribbean coast, is slowly vanishing beneath the rising tide. For generations, the Guna people have fished these waters and cultivated these shores, building a vibrant culture intricately woven into the rhythms of the sea. Now, the sea has turned against them. Storm surges breach their seawalls with increasing regularity; freshwater wells have turned brackish; and the ground beneath their homes grows sodden and unstable. In 2024, the community made the agonising decision to relocate to the mainland—the first officially recognised climate displacement in Central America. They will not be the last.

Carti Sugtupu is a microcosm of a catastrophe unfolding across every continent. Climate refugees—those compelled to flee their homes due to rising seas, devastating droughts, ferocious storms, and ecosystem collapse—represent one of the most pressing humanitarian challenges of the twenty-first century. Yet international law offers them scant protection, policymakers remain paralysed by political calculation, and the scale of the crisis continues to outpace even the most alarming projections.

Defining the Climate Refugee

The term “climate refugee” is deceptively simple. In reality, the relationship between environmental change and human displacement is extraordinarily complex, mediated by economic conditions, governance quality, social networks, and individual agency. A farmer in sub-Saharan Africa may abandon his land because crops have failed after consecutive droughts, but his decision is also shaped by the availability of urban employment, the presence of extended family in distant cities, and the effectiveness—or ineffectiveness—of government agricultural support programmes.

The Legal Vacuum

Under the 1951 Refugee Convention, a refugee is defined as someone who has crossed an international border “owing to well-founded fear of being persecuted for reasons of race, religion, nationality, membership of a particular social group or political opinion.” This definition, drafted in the aftermath of the Second World War, makes no provision for displacement driven by environmental factors. Climate refugees therefore lack the legal protections afforded to Convention refugees, including the principle of non-refoulement—the prohibition against returning refugees to countries where they face serious threats.

Numerous proposals have been advanced to expand the Convention or create a bespoke legal framework for climate displacement. The Nansen Initiative, launched in 2012 by the governments of Norway and Switzerland, developed a Protection Agenda that identifies effective practices for protecting cross-border disaster-displaced persons. However, no binding international treaty has emerged, and the prospects for one remain dim in an era of resurgent nationalism and border militarisation.

“We are sleepwalking into the biggest displacement crisis in human history. The legal frameworks we rely upon were designed for a world that no longer exists.” — Dr Walter Kaelin, Former Representative of the UN Secretary-General on the Human Rights of Internally Displaced Persons

Internally Displaced Persons

The majority of climate-displaced people do not cross international borders. They are internally displaced persons (IDPs)—individuals who have been forced from their homes but remain within their own countries. IDPs are entitled to protection under the Guiding Principles on Internal Displacement, but these principles are non-binding, and their implementation depends entirely on the willingness and capacity of national governments.

In 2024, the Internal Displacement Monitoring Centre (IDMC) recorded approximately 32 million new internal displacements associated with disasters, the majority of which were weather-related. This figure does not include the cumulative total of people living in displacement, which is estimated to be in the tens of millions. These individuals often languish in informal settlements, deprived of adequate shelter, healthcare, education, and livelihood opportunities.

Regional Hotspots of Climate Displacement

Small Island Developing States

The Small Island Developing States (SIDS) of the Pacific and Indian Oceans are the poster children of climate displacement. Nations such as Tuvalu, Kiribati, and the Marshall Islands consist of low-lying atolls with maximum elevations of just a few metres above sea level. Even modest sea-level rise threatens to render these territories uninhabitable through saltwater intrusion, coastal erosion, and increased storm surge damage.

Tuvalu, with a population of approximately 11,000, has already negotiated agreements with Australia and New Zealand to facilitate gradual migration as a form of planned relocation. The government has also taken the unprecedented step of creating a digital twin of the entire nation in the metaverse, aiming to preserve its sovereignty and cultural heritage even if its physical territory is lost. These measures, whilst innovative, offer cold comfort to a people facing the potential extinction of their homeland.

Sub-Saharan Africa

The Sahel region of Africa—stretching across Mauritania, Mali, Burkina Faso, Niger, and Chad—has experienced a catastrophic combination of rising temperatures, erratic rainfall, and land degradation. Agricultural productivity has plummeted, traditional pastoralist routes have been disrupted, and competition for dwindling water and arable land has fuelled intercommunal conflict.

The Lake Chad basin, which once supported a regional population of approximately 30 million people, has shrunk by 90% since the 1960s due to climate change and unsustainable water extraction. The resulting humanitarian crisis has displaced millions, exacerbated food insecurity, and provided fertile ground for insurgent groups such as Boko Haram. Climate change, in this context, is not merely an environmental issue but a profound threat to regional stability and global security.

South Asia and Southeast Asia

Cyclone Amphan, which struck the Bay of Bengal in 2020, displaced nearly five million people in Bangladesh and India combined. Whilst early warning systems and evacuation infrastructure saved thousands of lives, the destruction of homes, crops, and livelihoods generated long-term displacement that persists years later. As cyclone intensity increases with warming oceans, such events will become more frequent and more destructive.

Conclusion

The climate refugee crisis is not a distant hypothetical; it is a present reality for millions of people across the globe. From the sinking islands of the Pacific to the drought-stricken plains of the Sahel, human beings are being forced from their homes by forces beyond their control, into a world that offers them neither welcome nor protection.

The inhabitants of Carti Sugtupu have already begun their journey to higher ground. Millions more will follow. Whether they find refuge or rejection depends on choices that the world must make today. The tide is rising, and so too must our collective humanity.

For authoritative information on displacement and migration, consult the Internal Displacement Monitoring Centre (IDMC), the world’s leading source of data and analysis on internal displacement. The United Nations High Commissioner for Refugees (UNHCR) provides comprehensive resources on refugee protection, whilst the Intergovernmental Panel on Climate Change (IPCC) publishes authoritative assessments of climate science and its human impacts.