Indian Cities May Face Higher Temperature Rise: Study

Why in the News? 

A new study by researchers at the University of East Anglia warns that Indian cities may experience far higher temperature rise than projected by global climate models. The study finds that urban areas warm significantly faster than nearby rural regions due to the urban heat-island effect, potentially underestimating real heat exposure by up to 2°C in some cities.

The urban heat-island (UHI) effect refers to the phenomenon where cities are hotter than the surrounding countryside due to:

• Concrete and asphalt absorb heat
• Reduced vegetation cover
• Dense infrastructure traps heat
• Air pollution alters the radiation balance
• Waste heat from vehicles, air conditioners, and industries

Traditional climate models (Earth System Models) simulate regional warming but often fail to capture micro-urban thermal dynamics, especially in medium-sized cities fully.

Features 

• Covers 104 medium-sized cities in tropical and subtropical regions
• Includes 18 Indian cities
• Examines warming under a 2°C global warming scenario
• Focus: rate of urban warming relative to rural surroundings

Key findings:

• Indian cities warm ~45% faster than model projections
• Patiala could experience double the predicted warming
• Extra warming may range from 0.5°C to 2°C
• Medium cities are more vulnerable than mega-cities due to weak planning

The study shifts the question from “How hot will regions get?” to “How much hotter will cities get relative to their surroundings?”

Challenges

Underestimation in Climate Policy

• Planning based on incomplete temperature projections
• Risk of inadequate heat adaptation strategies

Public Health Crisis

• Higher heatstroke mortality
• Increased chronic illness risk
• Urban poor disproportionately affected

Energy Stress

• Rising cooling demand
• Power grid overload
• Increased fossil fuel dependence

Water Scarcity

• Heat intensifies evaporation
• Urban water systems under pressure

Infrastructure Fragility

• Roads, rail, and buildings degrade faster
• Higher maintenance costs

Governance Gap

• Medium cities lack climate-resilient planning
• Weak urban design standards

Way Forward

Urban Climate Mapping

• City-level thermal risk mapping
• Integrate UHI into climate models

Heat-Resilient Urban Design

• Cool roofs and reflective surfaces
• Urban forests and green corridors
• Permeable pavements

Climate-Smart Building Codes

• Mandatory passive cooling architecture
• Heat-reflective materials

Public Health Preparedness

• Heat action plans in all cities
• Early warning systems
• Cooling shelters

Energy Transition

• Solar-powered cooling
• Energy-efficient AC standards

Decentralised Urban Planning

• Empower municipal governments
• Climate budgeting at the city level

Conclusion

The study highlights a silent amplification of climate change inside cities. If global warming is the headline crisis, urban heat islands are the hidden multiplier. India’s medium-sized cities – engines of future growth – face disproportionate heat risk. Recognising this gap is essential for designing resilient urban futures. Climate adaptation must move from national averages to street-level realities.