Heat waves are becoming an economic risk as well as a public-health risk. Discuss their impact on India's power sector and coal supply chain.

Heat waves were once treated as a health emergency. Today they also strain India's energy system. Heat Action Plans now cover 23 states under NDMA's 2019 guidelines [5]. Yet heat pushes up power demand and runs down coal stocks, which makes a weather event an economic risk.

Impact on the Power Sector

• Demand surge: electricity output grew 9.8% in June 2026. Along with iron ore, it was a main driver of recent core-sector growth [2]. This demand comes from cooling, not new industry, so it fades when the weather changes.
• Peak-capacity stress: the government postponed planned maintenance of thermal units to free about 10,000 MW for April–June 2026 [3].
• Greater coal dependence: the West Asia crisis cut gas-based generation, so coal had to fill the gap [3]. Heavier coal use during heat waves works against energy-transition goals.
• Distorted signals: electricity carries the largest weight (30.932) in the new Index of Core Industries [2]. Core industries make up about 40% of the IIP's weight [1]. A heat-driven jump can therefore inflate industrial data and mislead policy.

Impact on the Coal Supply Chain

• Stock drawdown: plants entered summer with 58.2 MT of coal, about 19 days' use [3]. Prolonged high demand eats into this buffer.
• Breach of norms: the CEA's mandatory stocking norms require 12–17 days at pithead plants and 20–26 days at non-pithead plants [4]. Long heat spells push many plants below these levels.
• Seasonal mismatch: the norms were revised because supply falls during the July–September monsoon [4]. When heat lasts into these months, falling supply meets high demand.
• Production whiplash: mines and railways rush to refill plant stocks. Demand then drops in winter, which leaves capacity idle and raises costs for discoms.

Way Forward

• Link stocking norms to climate forecasts, so plants build larger stocks before El Niño summers.
• Move coal by rail in lean months; add battery storage and solar to meet daytime peaks.
• Connect Heat Action Plans with power-sector planning [5].

Heat waves hit both sides of the energy system at once: they raise demand and squeeze fuel supply. Climate-aware planning, combining fuel buffers, storage and demand-side efficiency, can turn this risk into resilience. That would advance SDG 7 (affordable and clean energy) and SDG 13 (climate action).