Examine how shared climate vulnerabilities of large Asian economies can serve as functional, non-sensitive avenues for diplomatic engagement even amid unresolved bilateral disputes.

Large Asian economies face near-identical climate stresses — urban flooding, extreme rainfall, Himalayan geohazards — that no border can filter. India and China, whose ties remain frozen since Doklam (2017) and Galwan (2020), show how disaster resilience can function as a working channel even when strategic engagement stalls.

Shared vulnerability creates convergent interest

• Both countries saw severe monsoon flooding in recent years — Indian coastal megacities receiving a month's rainfall within days, and riverine flooding across Assam, Odisha and China's Guangxi, Shaanxi and Gansu.
• Common drivers: loss of wetlands and permeable surfaces to rapid urbanisation, outdated drainage, weak waste management.
• Transboundary exposure — glacial lake outburst floods and Brahmaputra flows — makes unilateral resilience physically incomplete.

Why the arena is "non-sensitive"

• Resilience is neither economically competitive nor geopolitically strategic, unlike clean-energy supply chains, which have been securitised and politicised [1].
• Gains are non-zero-sum: hydro-meteorological data or early-warning exchange lowers mutual loss without altering the balance of power.
• Joint Himalayan disaster simulations are proposed as confidence-building measures between forces otherwise in standoff [1].

Institutional complementarity enables it

• India's model is capacity- and standards-led — the Coalition for Disaster Resilient Infrastructure (CDRI) [3]; China's is infrastructure- and finance-led — Sponge Cities and a 2026–30 action plan on geological hazards involving relocation, early-warning systems and a national data platform [4].
• An existing table already exists: India chairs the Asian Disaster Preparedness Centre since July 2024, of which China is a founding member [2].

Limits must be acknowledged

• Functional cooperation is a supplement, not a substitute, for political settlement; hydrological data-sharing has itself been hostage to border tension.
• No bilateral resilience agreement exists — it remains an analytical possibility, not policy [1].

Shared vulnerability thus converts a security problem into a technical one, where cooperation is cheap and defection costly. India should sequence engagement — beginning with data exchange and municipal knowledge-sharing through ADPC and CDRI, insulated from border talks. Anchored in SDG-11 and SDG-13 and the Sendai Framework, such issue-based engagement builds trust incrementally without diluting India's strategic position.