Delhi heatwave: The temperature in Indian capital showed 43.5C. Why did it feel hotter?
GS3Economy · S&T · Environment · Security· Climate change & international agreements· Prelims + Mains·
Why in news
Delhi recorded a 43.5°C air temperature while surface temperatures reached 64°C, highlighting the 'Urban Heat Island' effect and its impact on public health.
Background
The Indian Meteorological Department (IMD) recorded a maximum air temperature of 43.5°C in Delhi. Greenpeace India used thermal cameras to measure surface temperatures of up to 64°C in urban areas.
Facts for Prelims
- FactSurface temperatures in Delhi reached 64°C as measured by thermal cameras.
- FactIMD recorded a maximum air temperature of 43.5°C in Delhi.
- S&TUrban Heat Island (UHI) effect: Urban areas experience higher temperatures than surrounding rural areas due to human activity and infrastructure.
- EnvironmentThermal radiation: Heat absorbed by the human body from high-temperature surfaces like asphalt and concrete.
For Mains
Q. Discuss how rapid urbanization and the Urban Heat Island effect exacerbate the impacts of climate change on public health in Indian metropolitan cities.
Dimensions to cover in your answer
- Urban planning gap: Lack of green corridors and permeable surfaces leading to excessive heat retention in concrete-heavy zones.
- Infrastructure bottleneck: Inadequate cooling infrastructure and lack of shaded public spaces in densely populated urban centers.
Keywords: Urban Heat Island · Thermal Radiation · Climate Resilience · Public Health · Urban Planning
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