A methane burst in the under-construction Teesta Stage-VI hydroelectric tunnel in Sikkim's Namchi district has killed at least 15 workers — the latest in a series of tunnelling disasters that collectively expose persistent gaps in underground hazard assessment and safety compliance in India's infrastructure push through ecologically fragile terrain.

• Meghalaya, February 2026: Explosion at an illegal coal mine killed approximately 30 workers.
• Uttarakhand, 2023: Collapse of a road tunnel under construction trapped 41 workers for 17 days before rescue — the Silkyara tunnel incident.
• Teesta-III Dam, October 2023: A glacial lake outburst flood (GLOF) from the South Lhonak lake destroyed the Teesta-III dam, killing more than 100 people downstream — the same river system, the same fragility.
• Together these incidents underscore that underground and tunnelling fatalities in India are systemic, not isolated — and that they occur across sectors (hydro, roads, mining) and states.

• The 400-km Teesta stretch linking Sikkim, West Bengal and Bangladesh hosts a series of hydropower projects with varied histories of environmental clearance compliance but a shared characteristic: location in the geologically and ecologically fragile Himalayan belt.
• The 2023 GLOF demonstrated that these projects are exposed to compounding risks — glacial, seismic, and now subsurface gas hazards.
• India's push for green energy through hydropower brings a tension: large hydro is classified as renewable, but construction in active seismic zones carries both worker safety and downstream population risks that solar or wind do not.

• Immediate priority: rescue of all trapped workers.
• Post-emergency: a thorough, independent review of whether the conditions attached to the project's environmental clearance were strictly met in practice — not a departmental inquiry but an external, credible one.
• The government must not treat the disaster as an isolated misfortune — a series of such events demands systemic accountability, not case-by-case condolences.

• NHPC Limited — Central Public Sector Enterprise under the Ministry of Power; India's largest hydropower developer.
• GLOF (Glacial Lake Outburst Flood) — sudden release of water impounded by a glacial dam; a recurring Himalayan hazard intensified by climate change.
• Environmental Clearance (EC) — mandatory prior approval under the Environment (Protection) Act, 1986 and the EIA Notification, 2006 for hydropower and other large projects.
• South Lhonak Lake — the glacial lake in Sikkim whose 2023 GLOF destroyed Teesta-III.
• DGMS (Directorate General of Mines Safety) — the statutory body under the Ministry of Labour and Employment responsible for mine and tunnel safety standards.

With Iran reportedly instructing the Houthis to close the Strait of Bab el-Mandeb if the US attacks Iranian power plants, the author — an adjunct fellow at the Takshashila Institution — argues that India must proactively lead a theatre-specific naval task force with France and Japan to secure the strait and protect approximately one-third of India's total trade.

• From November 2023 to March 2024, the Houthis targeted at least 40 vessels in the Red Sea, claiming linkage to Israel. At least 2,000 ships rerouted around the Cape of Good Hope, reverting global shipping patterns by roughly 170 years.
• The US-led Operation Prosperity Guardian (December 2023) and UNSC Resolution 2722 (2024) were the multilateral responses; Israel also conducted unilateral strikes.
• The Indian Navy rescued the crew of a British tanker (26–27 January 2024) set ablaze by Houthis.
• Egypt lost a quarter of Suez Canal revenue; Israel's Red Sea port of Eilat filed for bankruptcy by July 2024.
• India leaned directly on Tehran to halt attacks on India-bound ships — a diplomatic lever that the author notes is no longer as available given changed India-Iran ties.
• The US declared a ceasefire in May 2025; the Houthis were weakened but not dismantled.

• US forces focused on Iran — unlike 2024, the US may not have the bandwidth to lead another Red Sea operation simultaneously.
• UNSC more divided — even a freedom-of-navigation call may not pass; enforcement is even less likely.
• India-Iran ties different — the diplomatic channel that halted India-bound attacks in 2024 is not as accessible today.
• Houthi maritime embargo on Saudi Arabia (announced 20 July 2026) — broadens the conflict beyond Israel-linked shipping to regional powers, potentially drawing in Egypt and Saudi Arabia who stood aside in 2024.
• China's approach — likely to again protect its own shipping through bilateral quid pro quos with the Houthis rather than a multilateral framework, creating an uneven playing field.

• Core coalition: India, France, Japan — chosen because all three have bases or logistics hubs in Djibouti (perched on the Red Sea/Bab el-Mandeb), and their navies have conducted joint drills with the Indian Navy.
• Engage Egypt and Saudi Arabia — both stayed out in 2024 on Gaza grounds; with Houthis now threatening Saudi ships, they may join. The Houthi "maritime embargo" on Saudi vessels (20 July) is a potential entry point for Indian diplomacy.
• Nature of the task force: Theatre-specific "Trade Protection Task Force," not a strategic alliance — an important distinction for India's strategic autonomy.
• Information Fusion Centre – Indian Ocean Region (IFC-IOR) hosted by India to provide maritime domain awareness to the task force.
• France and Japan to provide on-ground logistical support from their Djibouti bases; constituent navies to agree on joint rules of engagement.
• Security escorts for commercial and civilian vessels transiting the Strait, particularly those bound for Europe, India, or Japan.
• The task force as a demonstration of India's commitment to SAGAR (Security and Growth for All in the Region) — India's Indian Ocean doctrine.

• Bab el-Mandeb — Arabic for "Gate of Tears"; ~29 km wide; connects Red Sea to Gulf of Aden; one of the world's top five maritime chokepoints.
• Ansarallah / Houthis — armed group controlling northern Yemen; designated a terrorist organisation by the US (2025); backed by Iran.
• Operation Prosperity Guardian — US-led multinational naval operation (December 2023) to ensure freedom of navigation in the Red Sea.
• UNSC Resolution 2722 (2024) — called for an end to Houthi attacks on commercial shipping; did not authorise a force.
• P&I Clubs (Protection & Indemnity) — mutual marine insurance associations; over 90% of global shipping insured by just 12 clubs; their risk assessments effectively determine whether vessels transit or reroute.
• IFC-IOR (Information Fusion Centre – Indian Ocean Region) — India's maritime domain awareness hub at Gurugram; connects navies and coast guards across the Indian Ocean.
• SAGAR (Security and Growth for All in the Region) — India's Indian Ocean policy doctrine enunciated by PM Modi in 2015; emphasises rules-based maritime order.
• Cape of Good Hope route — the 170-year-old pre-Suez Canal alternative; adds ~10–14 days and significant fuel costs compared to the Red Sea–Suez route.