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Heat stress in cities
July 13 , 2025
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- The report titled “Urban Growth and Thermal Stress: A Decadal Assessment of Built-Up Area and Climate Interactions in Tamil Nadu” was prepared by the Tamil Nadu State Planning Commission.
- It reveals that the rising temperatures driven by urban sprawl, deforestation, and changes the land use are putting the people, ecosystems, and infrastructure at increasing risk.
- The Blocks such as Chennai (with 74% built-up area as of 2015), Coimbatore, and Tiruppur have seen significant urban sprawl.
- Out of 389 blocks analysed, 94 have shown very severe long-term increases in temperature, while 64 currently experience extreme heat stress.
- Significantly, 25 blocks, including the parts of Chennai, Karur, and Ramanatha puram, fall into both categories, making them the most vulnerable hotspots in Tamil Nadu.
- High-altitude regions have also recorded noticeable warming, up to 0.7°C in Kodaikanal and 1.2°C in Tiruttani.
- Tamil Nadu could experience annual air temperature increases of 0.9°C to 2.7°C by 2050.
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