17/04/2026
Ill-Designed Urban Planning: Built Environment and Urban Heat-Island Effect
Namma Bengaluru did not become hotter due to climate change alone, but due to land-use change and the built environment.
Abstract — ನಮ್ಮ ಬೆಂಗಳೂರು (Namma/Our Bengaluru), once celebrated as India’s “Garden City” for its abundant parks, trees, and lakes, historically enjoyed a pleasant and moderate climate. Situated at an elevation of about 900 meters on the Deccan Plateau, the city’s geography created a tropical savanna climate with relatively mild temperatures throughout the year.
This climatic advantage, however, has been steadily eroded during Bengaluru’s transformation into the Silicon Valley of India. Rapid and poorly planned urban expansion led to a significant shift in land use — from vegetation and water bodies to dense built-up surfaces. The degradation and encroachment of Rajakaluves, the city’s traditional stormwater drainage network, further disrupted its natural hydrological systems.
These changes have not only altered the city’s landscape but have also intensified its vulnerability to disasters and extreme weather events. Heatwaves are becoming more severe due to the urban heat-island effect, groundwater levels are depleting as natural recharge zones disappear, and urban flooding has become more frequent as drainage pathways are blocked.
Bengaluru’s experience demonstrates how planning decisions can transform a naturally climate-resilient city into one that amplifies heat and climate risks. It underscores how unsustainable urban development — marked by the replacement of ecological infrastructure with concrete — directly undermines environmental stability and urban livability.
Text in the Poster — Namma Bengaluru, called the "Garden City" for its parks and greenery, is historically characterised by a pleasant, moderate environment, owing to its high elevation on the Deccan Plateau, which creates a tropical savanna climate with mild, comfortable temperatures year-round. However, this has drastically changed over its journey to becoming the Silicon Valley of India. Ill-designed urban planning has resulted in land use grossly shifting from green cover to built-up areas and in the destruction of Rajakaluves (traditional stormwater drainage network). As natural cooling and drainage systems declined, Bengaluru has become increasingly vulnerable to disasters and extreme weather events, including heatwaves, groundwater crises, and urban flooding. Bengaluru’s decades-long transformation shows how unsustainable urban design and planning can erode inherent climate resilience and turn environmental advantages into growing risks.
Complete Blog — https://sangyan.medium.com/vatavaran-vaad-ill-designed-urban-planning-built-environment-and-urban-heat-island-effect-c0fce9332f93?postPublishedType=repub
About the Author — Adv. Abhishek Kumar, Founder and Curator of The Sangyan | द संज्ञान, Prakalp Drishtant | Project Drishtant | प्रकल्प दृष्टान्त, Project Sarlikaran | प्रकल्प सरलीकरण, and the ‘Build Forward Better’ Campaign
Sources and References —
1. Bangalore Urban Information System (BUiS) https://wgbis.ces.iisc.ac.in/sdss/BUiS/ #
2. Bangalore’s green spaces under peril: urgent need for urban reforestation. Available at:
https://evoscien.com/blog/bangalores-green-spaces-under-peril-urgent-need-for-urban-reforestation/
3. Bengaluru's green cover has fallen from 78% to 6%, its natural cooling systems are gone, and the city is baking. Available at: https://www.deccanherald.com/india/karnataka/bengaluru/green-cover-gone-bengaluru-baking-now-it-is-your-problem-to-fix-3968036
4. Satellite images show green cover of Bangalore reducing alarmingly fast. Available at: https://researchmatters.in/article/satellite-images-show-green-cover-bangalore-reducing-alarmingly-fast
5. Bengaluru Weather Swelters as IMD Warns Heatwave with Orange, Yellow Alerts Across Karnataka. Available at: https://www.oneindia.com/bengaluru/bengaluru-weather-swelters-as-imd-warns-heatwave-with-orange-yellow-alerts-across-karnataka-8059829.html
6. Bengaluru Weather Better Than Mumbai's? Internet Mocks Garden City Dwellers Amid Intense Heat Wave. Available at:
https://www.news18.com/viral/bengaluru-weather-better-than-mumbais-internet-mocks-garden-city-dwellers-amid-intense-heat-wave-8843593.html
Visual/Image Description [Alt Text] — Infographic series (on a blue-white background) — “Vatavaran Vaad | वातावरण वाद” with the title “|| Ill-Designed Urban Planning: Built Environment and Urban Heat-Island Effect ||”. Beneath that is a daytime picture of Bengaluru city’s skyline titled “Namma Bengaluru”. Within that image is a graph depicting the City Landscape Dynamics (Source: https://wgbis.ces.iisc.ac.in/sdss/BUiS/ #), highlighting the transformation of land use (Built up, Water, Vegetation, and Others) from vegetation-dominated (1973) to built-up-dominated (2025). Below the infographic is textual content — “Namma Bengaluru, called the “Garden City” for its parks and greenery, is historically characterised by a pleasant, moderate environment, owing to its high elevation on the Deccan Plateau, which creates a tropical savanna climate with mild, comfortable temperatures year-round. However, this has drastically changed over its journey to becoming the Silicon Valley of India. Ill-designed urban planning has resulted in land use grossly shifting from green cover to built-up areas and in the destruction of Rajakaluves (traditional stormwater drainage network). As natural cooling and drainage systems declined, Bengaluru has become increasingly vulnerable to disasters and extreme weather events, including heatwaves, groundwater crises, and urban flooding. Bengaluru’s decades-long transformation shows how unsustainable urban design and planning can erode inherent climate resilience and turn environmental advantages into growing risks.” At the top are logos of the ‘Build Forward Better’ campaign, the SDG infinity emblem (Build Forward Better, where We All Belong), the ‘Infinity Loop’ (Inclusion and Sustainability: For the Common Concerns of Humankind), The Sangyan, and Project Sarlikaran. At the bottom are , , and .