Heatwaves are no longer rare anomalies in temperate cities; they are lived, negotiated, and unevenly endured. Yet behavioural adaptation—a vital first line of defence—remains underexplored. Drawing on a sequential mixed-methods design integrating in-depth interviews (N = 21) and a nationwide survey (N = 1,849) across Dutch urban density gradients, this study shows that behavioural adaptation is less a matter of individual choice than of social, structural, and spatial constraint. Homeowners leveraged their control over private spaces to adopt both active and passive technological adjustments, achieving higher adaptation scores. Tenants, constrained by housing tenure, disproportionately relied on cultural adjustments rooted in social ties and experiential knowledge. Residents of very highly urbanised areas reported higher indoor temperatures and demonstrated the lowest adaptation scores, revealing density-driven limits to coping capacity. Gender and household composition further influenced adaptive capacity, with women and multi-person households displaying consistently stronger responses. By centring behavioural adaptation, the study identifies key barriers and exposes the mechanisms through which adaptation inequality takes shape in temperate urban settings.

In recent years, extreme temperatures have gained significant attention in urban studies, leading to the search for various adaptation and mitigation measures. While many studies employ heat-related indicators to assess climate-related health impacts, a better understanding of the multi-dimensional nature of these indicators can enhance their integration into urban policies, planning and design. This research aims to examine various dimensions of urban heat stress in built environments, using a systematic review of scientific articles (n = 146) and consequently, establishing a framework for effectively stratifying examples of related indicators across different dimensions. The results showcase dimensions including demographic, economic, health, urban climate, social, urban morphology, and institutional. However, literature disproportionately emphasizes demographic, health and climate dimensions, while social, urban morphology and institutional ones receive comparatively less attention. On the other hand, the co-occurrence analysis reveals connections among these dimensions and their related indicators, underlining the need for a holistic understanding of heat stress impacts. Additionally, the spatial distribution of the selected papers brings attention to the lack of studies in the regions identified as most exposed according to the Koppen Climate Classification. Accordingly, we advocate for more multidimensional and context-specific studies that bridge existing gaps. This research provides valuable insights for policymakers, planners, urban designers and researchers on advancing the understanding of urban heat stress in built environments and its impact on urban healh.

Residential environments are central to addressing urban heat stress for vulnerable populations and are prime target areas for implementing climate adaptation strategies. The reliance on urban heat island (UHI) intensity mapping alone has been argued to provide limited guidance for adaptation efforts, whereas linking heat patterns to the built environment characteristics through frameworks such as Local Climate Zones (LCZ) provides actionable insights for developing neighborhood cooling strategies. However, the widely used LCZ maps have a few limitations, such as misrepresenting variation within types because they cannot account for sub-classes beyond the standardized framework. This paper presents an unsupervised clustering approach to identify residential typo-morphologies across 99 Dutch cities, enhancing their relevance for urban heat vulnerability assessments. The analysis reveals that five morphological and canopy parameters (FSI, GSI, OSR, Havg, and FVC) selected from 17 parameters are sufficient to identify nine distinct residential typo-morphologies relatable to LCZs within 100 m x 100 m grid cells. The evaluations demonstrate that our approach detects underrepresented LCZ types and reveals new sub-classes absent from standard LCZ classifications. Key findings include detection of high-density areas (LCZ 42) reflecting recent urban densification with one of the highest UHImax next to LCZ 2 (4.2-4.9 K), and vegetation-differentiated variants within sparse and low-rise categories LCZ 9D and LCZ 6D, distinguished by distinctive UHImax (0.5-0.7 K) higher compared to their reference base types. Notably, tree coverage remains low across low-rise and compact typo-morphologies, revealing substantial opportunities for greening interventions. This data-driven refinement preserves LCZ's global comparability while considering local specificity, providing improved frameworks to inform targeted climate adaptation strategies in residential environments.

Urban heatwaves pose significant challenges to public health and well-being. Quantitative approaches focusing on heat hazards dominate the literature, while qualitative studies, particularly in temperate climates, remain underrepresented. Drawing upon the case of Rotterdam, a highly socially and spatially diverse city with a temperate climate, this research investigates residents' everyday lived experiences during heat events and their underlying coping mechanisms. Employing a hybrid thematic analysis based on 21 semi-structured in-depth interviews, the research discusses residents' behavioural adaptation, encompassing personal, technological, and cultural adjustments, along with their associated spatial dependencies. Findings indicate that adaptation practices occur across various spatial scales, with personal and technological adjustments primarily reliant on the house unit, while cultural adjustments extend to neighbourhood scales and beyond. Notably, control over the household unit emerges as a significant factor in shaping spatial dependence, highlighting an often-overlooked aspect of inequality. The study offers a conceptual framework for exploring residents' behavioural adaptation to extreme heat, facilitating the formulation of equitable and tailored planning strategies for temperate climates.

Addressing high-temperature exposure in cities requires understanding multiple environmental dimensions, with urban morphology playing a central role. Urban morphology—which include building density, height, and arrangement—significantly influences microclimatic conditions and opportunities for adaptation. A widely used framework for studying these relationships is the Local Climate Zones (LCZ), which provides a solid theoretical foundation for understanding urban climate variations. However, LCZ categories are often idealized and may not accurately reflect the complexity of real-world environments, particularly when attempting to describe both morphological and thermal properties simultaneously.Although urban form and thermal behavior are inherently interrelated, similar urban forms can exhibit different thermal responses depending on factors like vegetation cover, impervious surfaces, and building materials. To better represent real-world variability, separating morphological classifications from thermal characteristics allows for an analysis that accounts for these differences.To address these challenges, we develope an approach that generates empirically derived urban morhophological types while maintaining connections to LCZ categories. Our tool systematically classifies urban morphological types for fine-grained, nationwide assessments, enabling consistent comparisons across diverse Dutch urban residential areas. This approach uses readily available geospatial data and applies unsupervised machine learning techniques to identify urban morphological typologies. By standardizing the classification process into 100 x 100 m grid cells from Statistics Netherlands, our method provides a consistent spatial and temporal framework that transcends changing administrative boundaries.Our approach helps streamline vulnerability analysis by facilitating the intersection of multiple environmental and social dimensions. We demonstrate the tool's utility through an explorative analysis that identifies which socio-economic groups reside in neighborhoods with high heat exposure, considering both morphological types and additional factors influencing heat exposure. This tool provides urban planners and researchers with an empirically-grounded framework for identifying priority areas in existing settlements for scalable adaptation interventions across different urban contexts.

In recent decades, the increasing frequency, intensity, and duration of heatwaves generated by climate change has posed significant challenges to public health, particularly in urban areas. Despite extensive research on the impacts of heatwaves on human health, there is still a need for enhanced understanding of how, and to what extent, the spatial attributes of urban environments exacerbate these effects at the very local scale. This research addresses this gap and emphasises the importance of analysing the relationship among urban form, climate and health through high resolution geo-spatial data. By investigating the spatial correlations between geolocated cardiovascular and respiratory emergency calls, the modelled universal thermal climate index (UTCI) and selected socio-demographic factors during the summer of 2022 in Milan, this study aims to enhance our understanding of the complex interaction among heat, the built environment, and specific health outcomes. The findings identify geographical locations where emergency calls occur more frequently and where health concerns emerge during hot spells. Morphological and socio-demographic factors both play a critical role in determining vulnerability to heat stress. The results provide valuable insights for identifying high-risk areas, where tailored interventions in terms of planning, governance and urban design may be implemented to address heat-resilience and health-equity in cities.

The urban heat island effect is increasingly affecting the quality of life in cities, and detailed data is crucial in designing mitigation policies. However, weather stations are predominantly situated outside urban environments, limiting their ability to represent the varying air temperatures within street canyons. This data paper addresses this limitation by presenting a dataset of the modeled daily maximum urban heat island (UHImax) effect across 99 Dutch municipalities during the summer of 2023. This is achieved by implementing a semi-empirical equation that incorporates readily available meteorological variables and two key urban morphological indicators, namely the sky view factor and fractional vegetation cover. Two primary datasets are presented: (1) a high-resolution dataset of modeled UHImax, and (2) a sky view factor dataset. Both datasets are provided in GeoTIFF format at a 5-meter spatial resolution. Additionally, this paper presents a straightforward methodology for obtaining UHImax values for other periods. The datasets and accompanying methodology provide valuable resources for advancing urban climate research, urban planning and heat mitigation strategies in the Netherlands.

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Heatwaves in urbanized areas, even in temperate regions like the Netherlands, are getting serious attention. The Royal Netherlands Meteorological Institute predicts more frequent and intense heat events in the future. Studies have explored how Dutch cities contribute to heatwaves and suggested design and planning responses to mitigate their effects. However, a review of heatwave research in the Netherlands specifically focusing on the built environment has hardly been reported in the literature. This study aims to provide such a review utilizing the vulnerability framework. Following the PRISMA protocol, 57 articles are analysed based on the components of exposure, sensitivity, and adaptive capacity within the vulnerability framework. Subsequently, findings have been classified into five built environment scales - block, neighbourhood, district, city, and region - to critically reflect upon the extent to which the studies address various vulnerability components and the specific scales they primarily focus on. Results demonstrate that most of the studies concentrate on the hazard itself and its spatial distribution from a macro perspective on a city and regional scale. The review underlines the necessity of micro-level research on the phenomena, incorporating people's everyday experiences and resilience during heat events to find context-specific adaptation and mitigation strategies.

This paper discusses the effects of urban design parameters (street width and orientation) and building design parameters (roof shape and building envelope design) on solar access to the urban canopy, and on the viability of passive solar heating strategies in residential buildings. Solar access to the urban canopy is calculated using trigonometric equations based on the sun's position in the sky and the geometry of the canyon. Secondly, the passive solar heating potential in terms of the heat demand and solar heat gain of a single dwelling in different urban settings is calculated with aid of TRNSYS, a transient simulation tool. The outcomes of both the solar access to the urban canyon and the passive solar heating potential for individual dwellings are analysed to see whether the thermal conditions outdoor and indoor conflict or accord. In addition, this analysis is translated into guidelines for urban designers and architects that propose conditions for favourable solar access outdoors as well as indoors. (C) 2011 Elsevier B.V. All rights reserved.

The climate of a city influences the ways in which its outdoor spaces are used. Especially public spaces intended for use by pedestrians and cyclists, such as parks, squares, residential and shopping streets, and foot-and cycle-paths will be used and enjoyed more frequently when they have a comfortable and healthy climate. Due to a predicted global temperature rise, the climate is likely to be more uncomfortable in the Netherlands, especially in summer, when an increase in heat stress is expected. As the phenomenon of urban heat islands (UHI) aggravates heat stresses, the effects will be more severe in urban environments. Since the spatial characteristics of a city influence its climate, urban design can be deployed to mitigate the combined effects of climate change and UHI's. This paper explores these effects and tries to provide tools for urban design and strategies for implementation. Consequently, the applicability of the design tools is tested in a design for two existing Dutch neighbourhoods. (C) 2011 Elsevier B.V. All rights reserved.

Urban layout has a significant impact on the outdoor microclimate in the city. The urban fabric can limit solar access, but also has the ability to store and trap heat. This may lead to uncomfortable or even unhealthy situations outdoors. The indoor thermal environment can be controlled independent of dynamic outdoor conditions. However, this is undesirable from a comfortable and sustainable point of view. It is therefore preferable to find passive building strategies to support a comfortable thermal environment outdoors as well as indoors.In temperate climates, buildings facing south are preferable, as they yield the largest solar gain in the heating season and the smallest in summer. However, south facing row houses imply east-west running streets, which have larger street irradiance in summer - possibly leading to heat stress and a smaller street irradiance in winter compared to north-south running streets. In addition to orientation, the height to width ratio of streets is also of great importance since it defines the obstruction angle; buildings may cast shadows on the street or on the opposite building facade resulting in reduced solar gains.The full paper discusses the viability of passive solar heating strategies in residential buildings in The Netherlands under the influence of typical urban density and layout. In addition, the paper gives some guidelines for the integration of passive solar heating strategies for dwellings in different urban situations. The effects of orientation and street width of an urban canyon on the percentage of irradiated street and facade areas, for different seasons in The Netherlands, will be discussed in another paper by the authors.