Climate as a Threat Multiplier in the Sahel and Lake Chad: The AU's Decade of Recognition Meets Its Capability Deficit

This ASA Situation Report™ examines the decade-long mainstreaming of the agenda, the mechanisms of climate-conflict linkage in the Sahel and Lake Chad Basin, the status of the AU's response instruments, and the shift required from recognition to operational capability.

Executive Summary

On 18 September the PSC holds the only open session of the month, on the nexus between climate change, peace and security — a standing agenda item since the 585th session in March 2016 and now the subject of at least two sessions a year. This is the second climate session of 2026, following the 1344th meeting in May on the impact of climate change on the crises in the Sahel and Lake Chad. The recurrence is itself the story: the AU has succeeded, over a decade, in mainstreaming climate-security as a permanent Council concern. The open question is whether recognition has produced any operational capacity to act on it.

The session carries a specific implementation agenda inherited from prior decisions: the comprehensive mapping of climate impacts in the Lake Chad Basin and the Sahel, and the matrix of practical recommendations to be developed with ECOWAS, ECCAS and the Lake Chad Basin Commission, both tasked in May 2026; and the February 2026 (1331st) taskings to operationalise the African Humanitarian Agency and the Continental Civil Capacity Mechanism for disaster preparedness and response, to finalise the study on climate-related security risks, and to implement the PSC Matrix of threats to peace and security adopted in August 2025.

ASA's central judgment is that the AU has won the argument that climate is a security issue and has not yet built the instruments to treat it as one. The agenda has reached the characteristic plateau of a successfully mainstreamed theme — annual sessions, rich analysis, accumulating mappings and matrices — sitting above a thin layer of operational capacity. The session's real test is delivery: whether the mapping, the matrix and the two mechanisms have advanced from tasking to function.

1. A Decade of Mainstreaming

The PSC's engagement with climate and security is institutionalised in a way few thematic agendas achieve continuous attention since the 585th session in 2016, at least two dedicated sessions a year, a threats matrix adopted in 2025, and a study programme on climate-related security risks. This is a real achievement of norm entrepreneurship. Climate is no longer contested within the Council as a legitimate security concern — a contestation that persists in other multilateral fora — and the AU has positioned itself among the more forward-leaning international bodies on the linkage. The open-session format on 18 September, admitting non-members and partners, reflects both the agenda's maturity and the AU's confidence in owning it.

ASA Assessment — ASA assesses the mainstreaming of climate-security as the agenda's genuine success and its present trap. The Council does not need to be persuaded again that climate drives insecurity; the returns to continued recognition have diminished to near zero, and the entire marginal value has shifted to operationalisation. An agenda can be a victim of its own normative success when recognition becomes a substitute for capability, and climate-security has reached that point.

2. The Mechanisms of Linkage: Sahel and Lake Chad

The Sahel and Lake Chad Basin are the theatres where the climate-conflict linkage is most concretely observable, and the May 2026 session's focus on them was well-placed. The mechanisms are specific rather than abstract. Around a Lake Chad that has contracted dramatically over decades, the collapse of fishing, farming and herding livelihoods has stripped young men of economic options and rendered armed-group membership — with its wage, status and protection — comparatively attractive, feeding the recruitment pools of the Boko Haram factions and ISWAP. Across the Sahel, shifting rainfall and desertification have intensified competition between pastoralists and farmers over shrinking arable and grazing land and over water points, and this competition, mapped onto ethnic and communal lines and inflamed by the collapse of local dispute-resolution mechanisms, has become one of the principal drivers of the communal violence that jihadist groups then exploit and instrumentalise.

The analytical point is that climate does not cause conflict directly; it acts as a threat multiplier, degrading the livelihoods, institutions and social contracts that would otherwise contain competition, and thereby widening the space in which armed groups operate. This is why climate-security response cannot be military: it requires livelihood restoration, water and land governance, local conflict-resolution capacity, and anticipatory support before climatic stress tips into violence — precisely the civilian, developmental instruments the AU's security architecture is least equipped to deliver.

ASA Assessment — ASA assesses the climate-conflict linkage in the Sahel and Lake Chad as empirically robust and mechanistically understood climate as a threat multiplier acting through livelihood collapse and resource competition, not as a direct cause. The response implication is decisive — effective climate-security action is developmental and civilian, not military, which means it depends on precisely the response capacity the AU has tasked but not yet operationalised.

3. The Instruments in Question

Two operational instruments determine whether the agenda acquires capability. The African Humanitarian Agency, long envisaged as the continent's own vehicle for humanitarian and disaster response, would give the AU an independent capacity to respond to climate-driven displacement and disaster without waiting on external humanitarian systems — a capacity of growing importance as climate disasters intensifies and as external humanitarian funding contracts. The Continental Civil Capacity Mechanism, intended to marshal and deploy civilian expertise for preparedness and response, would supply the non-military capability that climate-security response fundamentally requires. Both were tasked for operationalisation in February 2026 with specific reference to climate disasters, and their status on 18 September is the single most important indicator of the agenda's trajectory. Neither is yet operational at the scale the agenda demands.

ASA Assessment — ASA assesses the African Humanitarian Agency and the Continental Civil Capacity Mechanism as the load-bearing elements of the entire climate-security agenda, and their slow operationalisation as its central weakness. A climate-security policy without a response capacity is analysis without action. The 18 September session should be judged less by its declarations than by what it can report on these two instruments; continued operationalisation without a delivery date and resourcing would confirm that the agenda remains recognition-rich and capability-poor.

4. From Mapping and Matrix to Measure

The May 2026 taskings for a Lake Chad Basin and Sahel mapping, and a matrix of practical recommendations developed jointly with ECOWAS, ECCAS and the Lake Chad Basin Commission, are methodologically sound: they recognise that climate-security response must be regional and must engage the sub-regional bodies and basin commissions that operate on the ground. But mappings and matrices are inputs, not outputs. The continent already possesses substantial knowledge of where climatic stress and conflict intersect; the marginal value of another authoritative map of a known problem is low. The value the session can add lies downstream: converting the mapping into a resourced, REC- and basin-commission-executed action plan, and establishing anticipatory-financing arrangements that release resources on climate early warning — before a drought becomes a displacement crisis and a displacement crisis becomes a recruitment opportunity — rather than mobilising after disaster has struck.

ASA Assessment — ASA assesses that the climate-security agenda's analytical phase is essentially complete and its implementation phase barely begun, and that the risk the 18 September session must avoid is treating a further matrix as progress. Practical traction requires that mapping feed directly into resourced, regionally-executed action and into anticipatory financing tied to early warning — the shift from knowing to doing that the accumulated documentation has not yet produced.

5. The Financing Dimension

Underlying the instrument and implementation gaps is a financing gap, and it has a particular character in the climate-security domain. Global climate finance has struggled to reach the fragile, conflict-affected states where the climate-security linkage is sharpest, precisely because those states are seen as high-risk environments for investment and programming — a paradox in which the places most exposed to climate-driven insecurity are the least able to access the finance that would build resilience. The AU's instruments, if operationalised, could partly address this by providing continental vehicles able to operate in environments external actors avoid; but they too require predictable funding, and the AU's broader peace-and-security financing constraints apply here as elsewhere. Anticipatory financing — releasing resources on forecast rather than after impact — is both the most cost-effective approach and the least developed.

ASA Assessment — ASA assesses the climate-security financing gap as compounded by the fragility paradox: climate finance flows least to the conflict-affected states that need it most. The AU's comparative advantage lies in vehicles able to operate where others cannot, but realising it requires the operationalisation and funding of the very mechanisms whose delay is the agenda's central weakness. Anticipatory financing is the highest-return, least-developed instrument, and its establishment would be a genuinely consequential outcome.

ASA Final Assessment

The climate-peace-security session is the clearest illustration in the September programme of a broader pattern in AU security governance: the Union is markedly better at recognising and analysing threats than at building the instruments to act on them. On climate the recognition is complete, the analysis is mature, the linkage mechanisms in the Sahel and Lake Chad are well understood, and the mainstreaming is a real achievement — but the agenda now stands or falls on operationalisation, and the two mechanisms that would give it capability, together with the anticipatory financing that would give it timeliness, remain in gestation. ASA assesses that the 18 September open session will be substantively meaningful only to the extent that it can report movement on the African Humanitarian Agency, the Continental Civil Capacity Mechanism, the conversion of the Sahel–Lake Chad matrix into funded regional action, and the establishment of anticipatory financing. Absent that, the session will renew a recognition that no longer needs renewing, while the climate-driven insecurity it so accurately describes continues to outpace the continent's capacity to respond.