Street view-derived city built environment and vulnerability to temperature extremes: a nationally representative population-based cohort study
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View abstract on PubMed
Summary
This summary is machine-generated.Urban built environments significantly impact vulnerability to temperature extremes. Specific street view features like sky view factor and interface enclosure modify mortality risks during heatwaves and cold spells, informing urban planning for climate resilience.
Area Of Science
- Environmental epidemiology
- Urban planning
- Public health
Background
- The urban built environment significantly influences population vulnerability to extreme temperatures.
- Existing population-based evidence on this relationship is limited.
Purpose Of The Study
- To investigate how street view-derived built environment characteristics modify the association between temperature extremes and all-cause mortality in urban residents.
- To provide evidence for adaptive urban planning and public health strategies.
Main Methods
- Utilized data from 21,494 urban residents in a nationally representative cohort study.
- Defined temperature extremes using residential address-specific thresholds (≥3 days).
- Analyzed street view images (500m radius) using semantic segmentation (DeepLabV3 Plus-ResNet101) and applied Cox proportional hazard and interaction models.
Main Results
- Each additional day of heatwave and cold spell duration annually increased all-cause mortality risk by 6% and 4%, respectively.
- Lower sky view factor (SVF) and openness, and higher grayness, building coverage, and interface enclosure (IE) were linked to increased mortality.
- Built environment factors, particularly IE, SVF, and openness, moderated the impact of temperature extremes on mortality, intensifying heatwave effects with high IE/low SVF and amplifying cold spell effects with low IE/high SVF in residential areas.
Conclusions
- Findings highlight the role of the built environment in modulating temperature-related mortality risks.
- Emphasizes the need for context-specific urban design to enhance both heat resilience and cold adaptation.
- Provides evidence for developing targeted public health interventions and urban planning strategies.
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