Article 1: High heat
Why in news: Early extreme heat is driven by weakened western disturbances, reduced thunderstorms, low convective cooling, lingering El Niño effects, and long-term climate change intensifying pre-monsoon heatwaves across India.
Key Details
- Heatwaves arriving earlier, with April temperatures resembling May–June norms
- 40°C+ temperatures already recorded across multiple Indian states
- Humidity + urban heat island effect worsening discomfort in cities
- 247 billion work-hours lost globally due to heat (The Lancet Countdown Global Report)
- Heat Action Plans lack funding and long-term structural measures
Early Arrival of Extreme Heat
- India’s summer heat has intensified unusually early this year, appearing in April instead of May–June
- The India Meteorological Department has issued heat alerts across central and southern regions
- Regions like Vidarbha, Chhattisgarh, Odisha, Telangana, and Kerala are already affected
- Several states have crossed 40°C, signaling a premature and severe summer
- This shift reflects a changing seasonal pattern of heatwaves
Regional Spread and Local Factors
- States such as Andhra Pradesh, Gujarat, Tamil Nadu, and Karnataka are nearing or crossing extreme heat levels
- Coastal areas face added discomfort due to high humidity
- The urban heat island effect is worsening conditions in cities
- Warmer nights reduce the body’s ability to recover from heat stress
- These factors collectively increase health risks and discomfort
Causes Behind Intensified Heatwaves
- Pre-monsoon heatwaves, though common, are becoming more intense and widespread
- Reduced western disturbances and thunderstorms have limited natural cooling
- Lower convective activity has further aggravated heat conditions
- The lingering effects of El Niño have contributed to rising temperatures
- Overall, climate variability is amplifying extreme heat events
Health, Livelihood, and Economic Impact
- Persistent heat raises cardiovascular mortality risks significantly
- The The Lancet Countdown Global Report notes 247 billion work-hours lost in 2024 due to heat
- Workers in construction and agriculture are the most affected
- Farmers face heat stress during the crucial rabi harvest season
- Faster crop maturity threatens food security and increases inflationary pressures
Policy Gaps and Way Forward
- Current Heat Action Plans (HAPs) focus mainly on emergency response, lacking long-term solutions
- Insufficient funding limits urban greening and worker safety measures
- Heat has already affected elections, forcing extended polling hours by the Election Commission of India
- India risks approaching human survivability limits if warming continues unchecked
- Stronger steps needed: long-term funding, mobile healthcare, doorstep services, and global climate cooperation (e.g., joining Colombia-led climate initiatives)
Conclusion
India’s intensifying and early heatwaves reflect deeper climatic shifts and inadequate preparedness. Rising temperatures threaten public health, worker productivity, agriculture, and economic stability. While short-term responses exist, systemic adaptation through better-funded Heat Action Plans, climate-resilient infrastructure, and global cooperation is essential. Without urgent intervention, increasing heat extremes may push several regions toward dangerous limits of human survivability and sustainable development.
Descriptive Question:
Q. “Early onset and intensification of heatwaves in India reflect both climatic changes and governance gaps.” Discuss the causes, impacts, and evaluate the effectiveness of Heat Action Plans in mitigating heat risks. Suggest improvements. (15 marks, 250 words)