Concrete fever: On India and heat management

2026-06-01 · 3 min

UPSC CSE Context Why in News: Sri Ganganagar recorded 48°C, the highest temperature in India this year, amid delayed monsoon and rising heatwave frequency. Syllabus Connection: Environment and Ecology: Urban heat islands, climate change impacts; Governance: Labour laws enforcement; Disaster Management: Heatwave mitigation. Exam Relevance: Connects climate change, urban planning, labour welfare, and disaster management for integrated answer writing. Core Issue Urban heat islands and lack of heat management make India's heatwaves lethal. Key Development: Urban heat islands in Indian cities are 2 10°C hotter than rural areas due to concrete, tree loss, and AC waste heat. Stakeholders: Informal sector outdoor workers Urban planners Employers State governments India Meteorological Department Static Knowledge High Value Background: India's Core Heatwave Zone covers central, northwestern, and eastern coastal regions 30% land area . Urban heat island effect: built up areas absorb and re radiat

## UPSC CSE Context **Why in News:** Sri Ganganagar recorded 48°C, the highest temperature in India this year, amid delayed monsoon and rising heatwave frequency.

**Syllabus Connection:** Environment and Ecology: Urban heat islands, climate change impacts; Governance: Labour laws enforcement; Disaster Management: Heatwave mitigation.

**Exam Relevance:** Connects climate change, urban planning, labour welfare, and disaster management for integrated answer writing.

## Core Issue Urban heat islands and lack of heat management make India's heatwaves lethal.

**Key Development:** Urban heat islands in Indian cities are 2-10°C hotter than rural areas due to concrete, tree loss, and AC waste heat.

**Stakeholders:** - Informal sector outdoor workers - Urban planners - Employers - State governments - India Meteorological Department

## Static Knowledge

**High-Value Background:** - India's Core Heatwave Zone covers central, northwestern, and eastern coastal regions (~30% land area). - Urban heat island effect: built-up areas absorb and re-radiate heat more than natural surfaces.

**Exam Linkage:** - Useful for questions on urban climate resilience and labour rights in heat stress conditions.

**Concepts in Context:** - Heat index: combines temperature and humidity to measure human physiological stress. - Urban heat island: temperature difference between urban and rural areas due to human activities.

**Institutions and Mechanisms:** - World Meteorological Organization (WMO) provides global climate data.

## Dynamic Analysis

### Environment and Ecology - Heatwave frequency increased by 0.1 days/decade since 1961; maximum duration up by 0.55 days/decade. - Urban heat islands amplify local temperatures by 2-10°C, worsening heat stress. - Delhi's humidity rose 8 percentage points (2015-19 to 2020-24) due to sealed surfaces, not just global warming. - AC waste heat creates a feedback loop: cooling indoors heats outdoors disproportionately.

### Governance - Existing labour laws mandating work stoppage at unsafe heat index are poorly enforced. - No national budget head for heat management; lack of coordinated policy response. - Building codes not updated for current climate; reflective materials and green cover not mandated.

### Social Justice - Informal sector workers (outdoor, street vendors) bear disproportionate heat burden. - Technological fixes like ACs benefit privileged indoor workers while worsening outdoor conditions. - Heat stress exacerbates inequality: poor lack access to cooling and have higher exposure.

## Prelims Takeaways - Urban heat island effect can raise city temperatures 2-10°C above rural surroundings.

## Mains Value Addition

**Arguments:** - Heat management requires urban design reforms (reflective materials, green cover) over technological fixes. - Enforcement of existing labour laws is more urgent than new legislation for heat protection. - Climate adaptation must integrate heat as a distinct budget head and policy priority. - Urban heat islands are a governance failure: unplanned concretisation and tree cover loss.

**Data Points:** - 2015-25 is the warmest 11-year period on record (WMO).

**Counterpoints:** - Technological fixes (ACs) are politically easier and provide immediate relief to some. - Mandating reflective materials may increase costs for builders and affect aesthetics. - Labour law enforcement is weak due to informal sector's size and lack of monitoring.

## Way Forward - Mandate reflective roofing and pavements in urban building codes. - Enforce heat index-based work stoppage laws with strict penalties for non-compliance. - Create a national heat management budget and integrate heat action plans in all cities. - Increase urban green cover through mandatory tree planting in new developments. - Promote passive cooling designs and district cooling systems to reduce AC dependence.

Source: The Hindu Editorial