Cool Cities Heat Risk Index (HRI) Arnhem 100 x 100m shapefile

Dataset: Cool Cities Heat Risk Index (HRI) – Arnhem, The NetherlandsDescriptionThis dataset contains the Cool Cities Heat Risk Index (HRI) for the municipality of Arnhem, The Netherlands. The HRI identifies where heat is most likely to cause harm by integrating hazard, exposure, and vulnerability indicators within a single, spatially explicit index. It is intended as a screening and prioritization tool for urban heat adaptation rather than a predictive model.The Arnhem HRI is calculated at 100 by 100 meter grid resolution using open national datasets. Values range from 0 to 1 and indicate relative heat risk within the city.InputsHazard: Share of grid cell area exposed to PET values at or above the defined heat stress threshold.Exposure: Number of residents, women, children (0 to 15), elderly residents (65 plus), and dwellings per grid cell.Sensitivity: Single person households, residents receiving unemployment, social or disability benefits, rented dwellings owned by housing corporations, and residents with a migration background.Adaptive capacity: Percentage of owner occupied dwellings and average property value.Indicators are capped at mean plus two standard deviations and normalized to ensure comparability across the city.MethodsThe HRI is calculated as the product of hazard, exposure, and vulnerability. Vulnerability is defined as two times sensitivity minus adaptive capacity and subsequently normalized. Missing data are handled using neutral fallback values where possible. A fourth root transformation is applied to the final normalized HRI to enhance readability while preserving relative ranking.Intended useThe dataset is intended to support evidence-based prioritisation of cooling measures, development of local adaptation plans, and spatial comparison of heat risk within Arnhem.LimitationsResults depend on proxy indicators for social vulnerability and adaptive capacity. The index reflects relative risk patterns under extreme heat conditions and does not capture health outcomes, behavioural responses, or fine-scale microclimatic variation.