Paper: GS – I, Subject: Geography, Topic: Geo-physical Phenomenon, Issue: Warmer Nights and India’s Growing Heat Crisis.
Context:
Warmer nights are emerging as a serious public-health challenge in India’s urban summers. Unlike daytime heatwaves, high night-time temperatures deny the human body the cooling period needed for recovery, especially among low-income households without ventilation or air-conditioning.
Key Takeaways:
Explanation:
Public Health Impact:
- Cooler nights help the body recover from daytime heat stress.
- When nights remain hot, heat exposure becomes continuous and prolonged.
- This can cause sleep discomfort, fatigue, reduced productivity, cardiac stress, respiratory complications and kidney-related problems.
- Elderly people, children, outdoor workers, construction labourers, vendors and gig workers are highly vulnerable.
Urban Housing and Inequality:
- Many urban households live in small, cramped and poorly ventilated homes.
- Low-income groups often lack access to air-conditioning or quality cooling systems.
- Dense housing clusters reduce air corridors and trap heat inside residential areas.
Heatwaves versus Perennial Heat:
- Heatwaves are specific events declared under defined temperature criteria.
- Extreme heat, however, is becoming a constant summer condition.
- Rising night-time temperatures may remain dangerous even when formal heatwave conditions are absent.
Governance and Planning Gaps:
- Heat Action Plans usually focus on early warnings, advisories, cooling centres and emergency coordination.
- Many plans suffer from weak funding, poor enforcement and inadequate attention to long-term adaptation.
- Urban planning must include ventilation, green spaces, cool roofs, reflective coatings and low-cost passive cooling solutions.
Conclusion:
Warmer nights convert summer heat from a daytime discomfort into a round-the-clock health burden. India’s response must shift from heatwave management alone to long-term heat-resilient housing, urban design and public-health planning.
Source: (The Indian Express, The Hindu, Live Mint)
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