Published on: July 11, 2025
URBAN HEAT CRISIS IN BENGALURU: KEY FINDINGS FROM NEW STUDY
URBAN HEAT CRISIS IN BENGALURU: KEY FINDINGS FROM NEW STUDY
- A recent study highlights a dramatic 1,078% rise in Bengaluru’s built-up area from 1973 (7.97%) to 2025 (87.64%), causing severe urban heat effects.
- The city’s May temperatures surged from 16–18°C in the 1970s to 34°C in 2025, correlating with declining vegetation and increasing paved surfaces.
- Urban Heat Island (UHI) archipelago—a concentration of localised heat zones—was especially observed in eastern and northern Bengaluru.
- 15.41 sq. km of the city now falls under “very high temperature” zones, while only 168.93 sq. km remains under ecologically favourable conditions.
- UTFVI (Urban Thermal Field Variance Index) indicates 545.25 sq. km is under ecologically unfavourable thermal stress.
- The transformation followed three urban growth phases: public sector-led expansion (1973–92), IT and SEZ-driven boom (post-2002), and rapid urbanisation (2012–21).
- Loss of 88% vegetation cover and 79% water bodies worsened ecological balance, hydrology, and public comfort.
- Study recommends:
- 30% green/open space at plot level
- Mini forests of native species per ward
- Rejuvenation of 216 lakes
- Green corridors and sustainable urban planning
- Conducted by researchers from IISc and others, the study calls for urgent policy intervention to combat UHI and restore ecological health.
