Discuss how El Niño-driven monsoon variability affects India's power-sector energy mix and suggest measures to build resilience.
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El Niño is a warming of the central and eastern Pacific that weakens monsoon winds over India [1]. A weak monsoon means less hydropower when demand is already high, so coal plants have to make up the gap. In 2026, 84 of 191 thermal plants had critically low coal stocks [1]. This shows that India's energy mix still has no buffer against climate shocks.
Impact on the energy mix
- Hydro shortfall: Weak monsoon inflows cut hydropower generation in 2026. More of the load fell on coal plants [1].
- Demand stress: The hydro dip came alongside a 10% rise in power demand, the sharpest in a decade [1].
- Coal becomes the default balancer: Coal absorbs both shocks, so plant stocks drain fast. Power shortages in September 2026 were the highest since August 2023 [1].
- Cost and climate trade-off: Thin stocks push plants towards costlier imported-coal blending, which strains DISCOM finances. Heavier coal burn also works against decarbonisation goals.
El Niño → weak monsoon → ↓ hydro output + ↑ demand
→ coal overdrawn → critical plant stocks → load-shedding
Fig: How a climate shock turns into a power shortage
Measures to build resilience
- Forecast-linked stocking: Plants should build coal stocks before the monsoon whenever an El Niño year is forecast. In 2025, stocks reached a record 58.25 MT (about 25 days) [3], and that year India met a 241 GW peak with zero shortage [5].
- Logistics over mining: Expand silo loading by Railways and rake availability [3]. Turn the Inter-Ministerial Sub Group (MoP, MoC, Railways, CEA, CIL, SCCL) into a standing early-warning cell [2].
- Storage as the new balancer: Scale up the VGF-backed ~43 GWh of battery storage and pumped storage, helped by ISTS-charge waivers up to June 2028 [4]. This lets stored solar power take over hydro's peak-balancing role.
- Diversify and manage demand: Use solar-wind hybrids, stronger inter-regional transmission, and time-of-day tariffs to flatten peaks.
El Niño hits power supply through two channels at once: it cuts hydro output and pushes up demand. Coal is the shock absorber today. To build resilience, India needs climate-informed stocking now and large-scale storage soon after. Treating the coal stock and storage as a national energy-security reserve would support both SDG 7 (affordable, reliable energy) and the net-zero 2070 pathway.
Sources
- 1"Coal stocks critically low as power demand rises in India", The Hindu, 6 Oct 2026definition of El Niño and weak monsoon; fall in hydropower; 84 of 191 plants critical; 10% demand growth; September 2026 shortages highest since August 2023. Could not open or verify this article, so the link goes to the site's home page.
- 2PIB: Sustained Efforts to Enhance Coal Production & Supply to Thermal Power PlantsInter-Ministerial Sub Group (MoP, MoC, Railways, CEA, CIL, SCCL)
- 3PIB: Thanks to Silo loading by Indian Railways, Coal Stock at Thermal Power Plants Touches All-Time High of 58.25 Million Tonnes58.25 MT, 25 days, silo loading
- 4PIB: Development and Deployment of Energy Storage Capacities to Power Reliable Renewable FutureVGF for about 43 GWh of battery storage; ISTS waiver for BESS and pumped storage up to June 2028
- 5PIB: India successfully met peak power demand of 241 GW on 9th June, 2025 with zero peak shortage241 GW peak met with zero shortage