The strategic challenge confronting the Cocos Islands transcends the familiar litany of climate change impacts affecting low-lying Pacific territories. What distinguishes this case is the collision between environmental necessity and institutional contradiction: a government simultaneously investing half a billion dollars in military infrastructure on one island whilst proposing the abandonment of another, all within the same Australian territory operating under the same climate projections.
At the 2021 Census, 448 people lived on Home Island, one of only two inhabited islands among the 27 that compose the Cocos archipelago. This represents one of Australia's oldest continuous Muslim communities, tightly knit, culturally distinct and deeply connected to place. The islands sit approximately 2,900 kilometres north-west of Perth and 1,270 kilometres south-west of Jakarta, Indonesia. The community's presence is not incidental to Australian sovereignty; it is foundational. Yet contemporary policy appears to treat it as expendable.
The physical threat is genuine and measurable. According to a 2021 Coastal Vulnerability Study, vertical sea level rise has reached approximately 4mm per year around Home Island since 1992. Elders have witnessed the loss of 10-15 metres of land from the beachfront by the village in the past decade alone, prompting the construction of three seawalls. Government projections show that by 2030, sea levels could rise by 18cm along the Cocos Islands compared to 1992 levels. Scientists warn it could become reality within the next 40 years.
In response to this convergence of climate physics and colonial geography, the Australian government has proposed moving hundreds of residents from their island home within decades as part of a "long-term managed retreat" that is described as the most "viable option to protect lives in a socially, economically and environmentally respectful way." Yet this framing warrants scrutiny against actual resource allocation patterns.
The government is spending more than $500 million upgrading the airstrip to accommodate heavier military planes. In 2023, the Australian parliament approved plans to extend the airstrip by 150 metres so that it could take Boeing P-8 Poseidon aircraft capable of low-level anti-submarine warfare operations and high-tech military surveillance, with construction scheduled to start in 2024 and be completed by 2026. This represents defence capability enhancement justified on strategic grounds. That justification may be sound. What cannot be reconciled, however, is the simultaneous claim that protecting Home Island is not financially feasible.
Frank Mills, Cocos Islands Shire Council CEO, said the islands are effectively "treated like a colonial outpost" by the federal government. He is asking for $6 million in disaster mitigation measures but says he has been rebuffed on grounds of insufficient funds, claiming this is disingenuous because the defence department is investing over $500 million in upgrading the airport runway on West Island to accommodate military aircraft.
The government's position merits examination on its own terms. A Department of Defence spokesperson told SBS News the upgrade would improve facilities by enhancing the airfield's resilience against weather events, adding "This will help to provide some immediate resilience against climate change, to ensure transportation in light of rising sea levels and inundation." Defence has a statutory mandate to advance national security through capability development. That cannot reasonably be displaced by climate adaptation spending. Yet the framing obscures a more uncomfortable reality: the government has prioritised a capability that serves geopolitical interests over a mitigation measure that serves human vulnerability.
What often goes unmentioned is the relocation proposal's human architecture. While the draft Coastal Hazard Risk Management and Adaptation Plan suggested investigating relocation to West Island, many Home Islanders say they would prefer funding directed towards protecting both islands, rather than expanding military infrastructure. Houses on Home Island do not function as assets; they are rented or leased, often on 99-year arrangements, rather than privately owned. This means relocation would strip residents of property equity whilst offering no obvious mainland alternative they could afford without government compensation.
If relocation to West Island were to occur, many families would likely move to mainland Australia, where Cocos Malay communities are already established in places such as Katanning, Port Hedland or Geraldton, all in Western Australia. The cultural implications of such dispersal are not incidental. One resident said she was born on the island but could not say "my child is a Cocos Islander, because they're not born here." This captures the paradox of erosion that precedes physical inundation: the slow drain of institutional support that makes continued residence precarious, followed by forced departure justified as inevitable.
Australian Human Rights Commission president Hugh de Kretser says a forced relocation should only occur as a last resort, after exhausting all other reasonable options, noting that "the planned relocation of a community due to climate change raises a range of critical human rights issues."
The Cocos Islands situation illustrates a broader pattern in Australian external territory governance. The community exercised the democratic prerogative available to it. Under a UN-supervised vote of self-determination in 1984, the Cocos Malays voted to fully integrate with Australia. That integration has delivered citizenship, but the corresponding benefits in terms of infrastructure resilience, economic development, and genuine consultation on matters affecting survival remain contested. The proposal to relocate does not emerge from community demand; it emerges from planning documents generated by distant bureaucracies and presented as fait accompli.
The strategic calculus here involves several competing considerations. Australia faces genuine constraints on public expenditure. Defence priorities are legitimate, even if questioned by some. The physics of climate change are non-negotiable. Yet none of these facts eliminate the fundamental issue: a government has the capacity to invest in both military capability and community protection, and has chosen to prioritise the former whilst framing the latter as impossible. That is a choice, not a constraint.
For the residents of Home Island, the next 10 to 50 years will determine whether they can maintain presence in a place their ancestors occupied for two centuries. Scientists warn it could become reality within 40 years, which is within the lifetime of elders' grandchildren and great-grandchildren. Whether that outcome reflects climatic inevitability or institutional indifference will depend on decisions made in Canberra over the coming months.