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02 June 2026 5 views

India's Heat Wave Crisis — Climate Vulnerability

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02 Jun, 2026
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India's Heat Wave Crisis — Climate Vulnerability
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Rising temperatures and extreme heat events threatening public health, agriculture, and urban infrastructure in India.

Why in News

UPSC Editorial Analysis published on 2 June 2026 examines India's escalating heat wave crisis and its multidimensional impacts on health, economy, and ecosystems.

Key Facts

  • Heat waves are defined as periods when maximum temperature exceeds 40°C in plains and 30°C in hilly regions for at least 3 consecutive days. (UPSC Mains Usage: Links to GS3 — Disaster Management and Climate Change)
  • India Meteorological Department (IMD) is the nodal agency for heat wave forecasting and early warning systems under the Ministry of Earth Sciences.
  • National Disaster Management Authority (NDMA) released Heat Action Plan guidelines in 2016 to reduce heat-related mortality.
  • Urban Heat Island (UHI) effect intensifies temperatures in cities by 3-5°C compared to rural areas due to concrete surfaces and reduced green cover.
  • 2023-2026 period recorded India's highest consecutive summer temperatures since systematic records began in 1901.
  • Heat stress reduces labour productivity by up to 20% in outdoor sectors, impacting 300 million workers in agriculture and construction.
  • Wet Bulb Temperature (WBT) exceeding 35°C becomes fatal within hours as human body cannot cool through perspiration.
  • National Action Plan on Climate Change (NAPCC) includes National Mission for Sustaining Himalayan Ecosystem addressing mountain vulnerability. (UPSC Mains Usage: Constitutional peg — Article 48A directs state to protect environment)

Quick Revision Box

Term

Detail

Heat Wave Threshold

40°C plains, 30°C hills, 3 days duration

IMD

India Meteorological Department — weather forecasting agency

NDMA Guidelines

Heat Action Plan framework released 2016

UHI Effect

Urban temperature 3-5°C higher than rural areas

Wet Bulb Temperature

35°C WBT threshold — fatal human exposure limit

NAPCC

National Action Plan on Climate Change — 8 missions


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