Heatwave Vulnerability in India: Climate Change and Governance Challenges
Contents4
Indian Express - Explained · 4 May 2026 · 2 min read
Prelims · Environment Mains · GS3 Environment and biodiversity High relevance
IMD forecasts prolonged heatwaves in 2024 linked to El Niño, highlighting India's core heatwave zones and the need for robust heat action plans to mitigate public health and economic impacts.
Key points
Heatwave Definition: The India Meteorological Department (IMD) defines heatwaves as temperatures ≥5°C above normal for two consecutive days (≥7°C for severe heatwaves), with adjustments for plains/mountains and baseline temperatures.
Core Heatwave Zones: Northwestern/central India (extending to Bihar-Jharkhand) and Andhra-Odisha coast are India's primary heatwave regions, accounting for most heat-related deaths despite lower frequency in coastal areas.
[GS1-Geography] Mechanisms: Core zone heatwaves result from upper-atmosphere high-pressure systems causing air compression, while coastal heatwaves occur when westerly winds block sea breezes from the Bay of Bengal.
El Niño Linkage: IMD's 2023 report confirms correlation between El Niño events and increased heatwave frequency/duration, with 2024's developing El Niño expected to suppress monsoon rains and prolong heat conditions.
Climate Change Impact: IMD projects southern India and Northeast, historically heatwave-free, may face severe heatwaves by 2100, with current events already showing earlier onset (February 2023) and longer duration.
[GS3-Environment] Disaster Management: 23 states have heat action plans (HAPs) featuring public hydration points, adjusted work/school hours, and cooling shelters, but implementation remains uneven across urban/rural areas.
Economic Consequences: Prolonged heat reduces labor productivity (especially agriculture/construction), increases energy demand for cooling, and strains water resources, affecting GDP growth.
Way Forward: Strengthen HAPs with mandatory urban green cover norms, district-level early warning systems, and climate-resilient infrastructure standards under the National Action Plan on Climate Change (NAPCC).
Key terms
- India Meteorological Department (IMD)
- India's national meteorological service under MoES, responsible for weather forecasting, heatwave declarations, and monsoon monitoring. Its heatwave criteria (5-7°C above normal) guide state disaster responses and have legal implications for workplace safety under the Occupational Safety Act.
- El Niño Southern Oscillation (ENSO)
- A periodic climate pattern in the Pacific Ocean where El Niño (warming) and La Niña (cooling) phases alter global weather. For UPSC, it's critical for understanding monsoon variability (GS1), agricultural planning (GS3), and international climate agreements like the UNFCCC.
- Core Heatwave Zone
- Designated by IMD, this includes Rajasthan, Punjab, Haryana, Delhi, UP, MP, Chhattisgarh, Bihar, Jharkhand, and parts of Maharashtra. Its governance relevance lies in National Disaster Management Authority's (NDMA) regional preparedness mandates and the Sendai Framework's risk reduction targets.
- Heat Action Plans (HAPs)
- State-level frameworks under NDMA guidelines, mandating emergency measures during heatwaves. UPSC links include disaster governance (GS2), right to life under Article 21 (via heat-related deaths), and urban planning reforms under Smart Cities Mission.
Practice question
Discuss the multifaceted challenges posed by heatwaves in India, with special reference to their governance and climate change implications. (250 words, 15 marks)
GS3 15 marks 250 words Mains
Key terms to include: Core Heatwave Zone Heat Action Plans (HAPs) El Niño Southern Oscillation (ENSO) National Disaster Management Authority (NDMA) Climate-resilient infrastructure UNFCCC Smart Cities Mission Occupational Safety Act
Answer framework
Introduction
Briefly define heatwaves as per IMD criteria and mention their increasing frequency due to climate change. Highlight their impact on public health, economy, and governance.
Climate Change Linkages
El Niño's role in exacerbating heatwave conditions and suppressing monsoon rains.
Projected expansion of heatwave zones to previously unaffected regions like southern India and Northeast by 2100.
Earlier onset and prolonged duration of heatwaves as evidenced in 2023.
Governance Challenges
Uneven implementation of Heat Action Plans (HAPs) across 23 states, with disparities between urban and rural areas.
Need for robust early warning systems and district-level preparedness under NDMA guidelines.
Integration of climate-resilient infrastructure standards in urban planning under Smart Cities Mission.
Economic and Social Impacts
Reduction in labor productivity, especially in agriculture and construction sectors.
Increased energy demand for cooling, straining power infrastructure.
Public health crises and strain on healthcare systems due to heat-related illnesses.
Conclusion
Emphasize the need for a multi-pronged approach involving stricter implementation of HAPs, urban green cover norms, and international cooperation under frameworks like UNFCCC to mitigate heatwave impacts.
Fact check
All facts verified