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India has been reeling at the forefront from the impact of climate change over the past few years. Earlier imagined to be a faraway possibility, climate change is showing up with consequences such as routine heatwaves, an increase in the frequency of El Niño events, excessive rainfalls leading to floods, and even an increase in wet-bulb temperatures, especially in South India, due to the unique positioning of the subcontinent. 

So, when Delhi faces intense heatwaves and erratic rainfall patterns, it feels like an inevitable consequence of climate change. Though convenient, it can be deeply misleading, especially given the science of urban microclimate, which shows with uncomfortable precision that this might be a by-product of governance. Where parts of Delhi record surface temperatures close to 50°C, while green spaces are dramatically cooler, the questions turn to what we choose to regulate, what we ignore, and, crucially, who we prioritise. 

Empirical data show this in greater detail: built-up zones like Connaught Place and Karol Bagh have consistently recorded surface temperatures of 47-49°C, while green spaces like Lodhi Garden and the Central Ridge have been significantly cooler, sometimes by more than 6°C. This is not merely a marginal variation but a structural divide, especially when we take into account the materials we build with, the green cover and vegetation we seek to remove or retain, which are more often than not by-products of law and policy, and the city has legislated into heat. 

Yet, when we analyse the regulatory framework governing urban development, such as the Master Plan of Delhi, 2041 (MDP 2041), Delhi remains strikingly indifferent to this reality, gesturing towards sustainability but stopping short of imposing enforceable, microclimate-sensitive obligations – the legal, regulatory and design requirements to mitigate climatic impacts.

With no binding requirement for tree canopy cover – especially in high-density zones or reflective/heat-reducing building materials – and no thermal impact for planning approvals, even the most “instrumental” Environmental Impact Assessment (EIA) regime, which scrutinises its effects on air, water and biodiversity, fails to consider heat as a parameter, and overlooks its contribution to urban heat accumulation. 

In a city where heatwaves are becoming routine, this omission is not just a gap; it is a regulatory blind spot. This problem is not limited to the absence of tree-canopy mandates as the Master Plan 2041 repeatedly invokes the language of sustainability, resilience and climate responsiveness without any enforceability mandate and thus remains largely aspirational. 

The Plan does not prescribe any measurable minimum green-over requirements across neighbourhoods, nor does it require heat-vulnerability mapping at the ward or even zone level before any major developmental projects are approved. It encourages a ‘Sustainable, Liveable and Vibrant Delhi’ through densification through transit-oriented development and mixed-use planning, but does not have corresponding obligations to mitigate the urban heat island effect through measures like shading, cooling corridors, reflective materials, or thermal-performance standards. Aspects of ‘Blue-Green’........

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