18.02.2026

Designing heat-resilient neighborhoods – planning criteria and scientific models

Building design

Panorama of Innsbruck, Austria, with brightly colored buildings on the riverbank and majestic mountains in the background. Photo by Wolfgang Weiser.

Heatwaves are the new normal. City districts that defy the urban oven are no longer wishful thinking, but a tough competitive factor for quality of life. But how do you design truly heat-resilient neighborhoods? Between scientific models, local climate data and planning pragmatism lies the key to cities that will still be habitable in 2050 – and could even win. Welcome to the laboratory of the future, where asphalt and algorithms count the beads of sweat together.

Definition and relevance of heat stress in urban neighborhoods in the DACH region
Planning criteria for heat-resilient neighborhoods and their scientific basis
Overview of microclimatic models, tools and their use in practice
Concrete measures: Green structures, water areas, choice of materials, design of public spaces
Social aspects and governance: participation, acceptance and regulation
Best practices from Germany, Austria and Switzerland – from simulation to implementation
Limits and risks: Technical, legal and cultural stumbling blocks
Outlook on innovative approaches and the role of digital twins in heat management

Heat in the city: the underestimated danger and the new task of planning

The long-standing idea that cities are only a little warmer in summer than the surrounding countryside has finally been revealed as a myth in recent years. In the densely built-up districts of Frankfurt, Vienna and Zurich, temperatures regularly rise several degrees above those in the surrounding areas. The “urban heat island” effect is no longer an academic term, but a daily reality that massively affects the health, productivity and well-being of city dwellers. Heatwaves are no longer a state of emergency, but a predictable cycle in the course of the year – and they particularly affect those neighborhoods where building density, sealed surfaces and a lack of green structures come together. Climate change not only sets the pace, but also turns the amplifier up to maximum.

The consequences are serious: overheated homes, heated streets, increasing health risks for vulnerable groups and a growing burden on infrastructure and energy supply. In recent summers, cities such as Karlsruhe and Basel have had to activate heat action plans, set up fountains and close roads because the temperatures have simply become life-threatening for elderly people and children. The pressure on planners and local authorities to act is growing – not least because even the real estate industry is now calling for a price point for “shady locations”.

But how can this challenge be met at neighborhood level? Traditional urban planning is quickly reaching the end of its tools here. It is no longer enough to plant a few trees or prescribe new façade colors. Heat stress is a complex, dynamic phenomenon that penetrates deep into the DNA of the neighborhood structure. The interactions between materiality, topography, building density, proportion of greenery and social factors must not only be recognized in planning processes, but also weighed up in real time. Anyone planning neighborhoods today must understand the microclimate as a central planning parameter – and use new, data-based and participatory methods to do so.

In practice, this means that local authorities and planning offices themselves must become microclimate detectives. The simple transfer of climate models from meteorology only works to a limited extent at neighborhood level. It requires local, detailed analyses and the willingness to optimize even supposedly banal details such as street orientation, building heights or surface materials. The good news is that the knowledge and tools are available – they just need to be used.

Social pressure is growing. Citizens’ initiatives are calling for more shade, young families are protesting against playgrounds without trees, senior citizens’ associations are demanding cool retreats. Urban planning is faced with the task of not only designing more resilient neighborhoods, but also seriously incorporating the different needs and perceptions of the population. Heat management thus becomes a multi-layered governance project that goes far beyond traditional spatial planning.

The time of pilot projects and studies is over. Municipalities that design heat-resilient districts today not only secure a locational advantage, but also become pioneers of a new planning culture. Those who ignore the issue risk not only damage to their image, but also concrete health and liability problems. The debate about heat-resilient neighborhoods marks the beginning of a new era in urban planning – and posits the thesis that climatic comfort will become the new model for urban quality of life.

Planning criteria for heat-resilient neighborhoods: Science meets practice

The development of heat-resilient neighborhoods begins with a clear definition of planning objectives. What does “heat stress” actually mean in an urban context? Science talks about average daily temperatures, tropical nights, thermal comfort and bioclimatic parameters such as PET (Physiological Equivalent Temperature). In planning reality, however, it’s all about very specific questions: How hot does it get in the schoolyard at 2 pm? How long does the inner courtyard stay hot after sunset? When does the quality of life in public spaces deteriorate?

The most important planning criteria today can be divided into four central dimensions: Firstly, the reduction of radiant heat, for example through shading, greenery and reflective materials. Secondly, the promotion of evaporative cooling, which can be achieved through green spaces, water features and permeable soils. Thirdly, the optimization of air circulation in order to dissolve heat build-up between buildings. And fourthly, minimizing heat input through clever material selection and technical solutions such as green roofs or façades.

Research provides reliable models and simulations for all these criteria. Tools such as ENVI-met, the urban climate model PALM-4U or the Urban Climate Canopy Model make it possible to calculate various scenarios and precisely map the effect of individual measures on the microclimate. In cities such as Stuttgart or Vienna, these tools are already being used in urban land-use planning to develop heat-optimized development plans. The results are often surprising: even small changes to the building layout or the choice of plants can noticeably shift the local temperature profile.

But scientific models alone do not make a heat-optimized neighbourhood. The decisive factor is how the findings are translated into robust regulations, design manuals and concrete design decisions. Many local authorities are still lagging behind here. The integration of climate protection and climate adaptation into urban land-use planning requires interdisciplinary expertise, pragmatic interfaces between science and administration and, above all, a willingness to break new ground. Examples such as Vienna’s urban climate model or the climate adaptation statutes in Freiburg show that it is possible – if the political will and technical understanding work together.

Practice also requires a keen sense of local peculiarities. What works in Hamburg can fail in Munich. The differences in microclimate, vegetation, social structure and legal framework are enormous. Successful heat-resilient districts are created where planners, climatologists, landscape architects and the population work together on tailor-made solutions. The planning criteria are not a rigid corset, but a toolbox that reacts flexibly to the respective challenges.

In the end, it’s the implementation that counts. A heat-resilient district is not a product of chance, but the result of consistent, interdisciplinary planning. Anyone who ignores the scientific models is designing without taking needs into account. Those who apply them dogmatically risk solutions that are far removed from practice. The trick is to use data, experience and the will to design to create a district that will still be considered a liveable address in 30 years’ time – even if the thermometer is chasing records.

Microclimatic models and tools: simulation, scenarios and the digital revolution

The days when urban climate analyses consisted of a few measuring stations and empirical values are definitely over. Today, modern microclimatic models provide a wealth of data that is invaluable not only for science, but above all for planning practice. Tools such as ENVI-met, RayMan or PALM-4U have long been part of the standard repertoire in many offices – at least in theory. In practice, however, the path from simulation to implementation is full of pitfalls.

ENVI-met is regarded as the Swiss army knife of microclimatic simulation. It makes it possible to calculate the effect of trees, facades, water surfaces and surface materials on temperature, humidity and wind currents at plot level. ENVI-met provides reliable information on where heat islands arise and how they can be mitigated, particularly in the case of redensification or new-build districts. However, the software is complex, data input is time-consuming and interpreting the results requires experience and sensitivity. Anyone who believes that a click on the simulation button is enough has misunderstood planning in the digital age.

PALM-4U, developed as part of the German BMBF research project “Urban Climate in Transition”, goes one step further. It allows the simulation of entire city districts and integrates aspects such as traffic, energy and emissions in addition to climate data. The special feature: PALM-4U is open source and is being actively developed further with local authorities and practice partners. This creates an ecosystem that aims not only for scientific excellence, but also for practical suitability. Cities such as Berlin and Essen are already using PALM-4U to make urban development projects climate-ready.

There are also specialized tools such as RayMan, which focuses in particular on evaluating thermal comfort from a pedestrian perspective. This is particularly important for the design of public spaces, schoolyards and playgrounds. After all, it’s not just about average temperatures, but about the question: when and where is a space actually used – and when does it become an inaccessible roasting area?

However, the digital revolution has another dimension: urban digital twins, i.e. digital twins of entire neighborhoods, enable real-time analyses and make the effect of measures immediately visible. With sensor technology, geodata and AI, planners can not only run through scenarios, but also discuss and adapt them with citizens. Cities such as Vienna and Zurich use such systems to actively involve the population and make planning transparent and comprehensible. This opens up a new quality of participatory urban development – as long as the tools remain open and comprehensible.

But despite all the enthusiasm for technology, one thing remains clear: microclimatic models are tools, not panaceas. They are no substitute for urban planning intuition, local experience or dialog with local people. However, they can help to make complex relationships visible, debunk myths and put decisions on a rational basis. Those who use them correctly will gain a decisive advantage – and prevent neighborhoods from mutating into investment ruins during the heatwave.

Concrete measures for heat-resilient districts: green, water, materials and governance

Any simulation is only as good as the measures that follow from it. Heat-resilient districts require a whole bundle of strategies that are interlinked and adapted to the specific local conditions. Green infrastructure is traditionally at the center of this. Trees, green corridors, green roofs and façades are not just decorative, but essential for shading, evaporation and improving air quality. The choice of tree species is anything but trivial: drought resistance, crown shape and root spread are decisive factors for success. Cities such as Basel and Vienna have developed their own tree lists for climate adaptation – a detail that is often underestimated in planning.

Water plays an increasingly important role. Open water areas, water features, fountains and infiltration basins act like natural air conditioning systems. They not only cool the surroundings, but also invite people to linger and promote biodiversity. Innovative approaches such as “sponge city” concepts focus on storing rainwater locally and using it for evaporation instead of simply draining it away. This creates new qualities in public spaces – and at the same time increases resilience to heavy rainfall events.

The choice of materials often has a hidden impact on the microclimate of a neighborhood. Bright, reflective surfaces reduce the absorption of solar energy, while permeable coverings allow evaporation and water retention. Today, asphalt deserts without shade are a planning mistake that pays off. The integration of climate-active materials into design manuals and tender texts is a must for sustainable neighborhoods.

But green and blue infrastructure alone is not enough. The design of public spaces – from the width of streets and furniture to the placement of recreational areas – determines how and when a neighborhood is actually used. Flexible shade elements, pergolas, arcades, green parklets and temporary installations can provide short-term relief, while long-term strategies focus on structural shading and the integration of green corridors.

Governance is the underestimated key. Without clear objectives, monitoring and participation formats, many measures get bogged down in the minutiae. The successful development of heat-resilient districts requires a new planning culture in which administration, politics, the real estate industry and civil society work together as equals. Participatory planning processes, transparent communication and the willingness to take unusual paths are central to this. This is the only way to create acceptance – and a neighborhood that is not only tolerated but loved by its users.

Experience shows that there is no universal solution. Every neighborhood is its own laboratory in which measures have to be tested, adapted and further developed. The willingness to learn from mistakes and share successes is as important as the best simulation model. Cities that follow this path become role models – and show that heat-resilient districts are not only possible, but can also be attractive and economically successful.

Innovation, risks and outlook: The future of heat-resilient neighborhood planning

The development of heat-resilient neighborhoods is at an exciting turning point. While the technical and scientific possibilities have grown rapidly in recent years, implementation on a broad scale often remains hesitant. The reason lies less in a lack of knowledge than in the complexity of the task: technical, legal and social aspects must be interwoven into a consistent whole. This shows how much neighborhood planning has also become a management project today – one that requires courage and a willingness to innovate.

Digital twins, dynamic simulation models and AI-supported planning tools open up new horizons. They make it possible to run through scenarios in real time, visualize effects and actively involve the population. But this is also where risks lurk: The danger of technocratization, algorithmic bias and the commercialization of planning data is real. Anyone designing heat-resilient neighborhoods must not only rely on technology, but also on transparency, participation and openness.

Legal hurdles, such as the adaptation of existing development plans, the enforcement of greening obligations or the financing of innovative measures, are slowing down progress in many places. At the same time, there is a growing awareness that “business as usual” is no longer an option. Funding programs, such as those currently being set up in Germany, Austria and Switzerland, are providing important impetus. However, it is crucial that the projects are not limited to lighthouses, but are integrated into everyday planning.

The social dimension is often underestimated. Heat management is not just a question of technology, but also of justice. Vulnerable groups, such as the elderly, children or people on low incomes, are particularly affected by heat stress. Planning must therefore focus on compensation and participation – be it through cool retreats, free drinking water points or targeted communication. The city of the future will not only have to be smart, but also socially resilient.

Innovative approaches often emerge where traditional planning stops. Pop-up green spaces, temporary shading projects, participatory monitoring initiatives and the integration of citizen science into climate data analysis show that a lot can be achieved even with limited resources. The future of heat-resilient neighborhoods lies in the combination of high-tech and low-tech, of scientific excellence and practical creativity. Those who master this mix will not only design climate-adapted cities, but cities that are truly worth living in.

The outlook is clear: heatwaves are here to stay – but so is the opportunity to turn them into better neighborhoods. Tomorrow’s planners will be managers of microclimates, mediators between data and everyday life, and designers of spaces in which summer does not become a test of courage. The heat-resilient city is not a dream – but a task that begins today.

Conclusion: Heat protection as the guiding principle of the new urban planning culture

Heat-resilient districts are far more than just a fashionable buzzword. They mark the interface between science, planning and social responsibility – and are becoming a yardstick for the future viability of our cities. The models, tools and practical examples are available. What is often missing is the courage to use them consistently, the willingness to question traditional routines and the openness to enter into new partnerships. Anyone planning neighborhoods today is not only designing spaces, but also microclimates, social networks and urban identity. The combination of data-based planning, participatory governance and design excellence creates neighborhoods that are not only resilient to heat, but also sustainable and attractive. The future of the city lies in the shadows – in a positive sense. And anyone who recognizes the signs of the times knows that heat protection is not a luxury, but the new guiding principle of urban planning culture.

18.12.2024

Product

Wood – an urban material ?

Building design

Wood in the cities – there are a number of arguments in its favor. The material is CO2-neutral, has good insulating properties and is a renewable raw material. Architect and civil engineer Wolfgang Winter would design any new building out of wood. Sufficient material and the technology to build upwards are available.

Wood in the cities – there are a number of arguments in its favor. The material is CO2-neutral, has good insulating properties and is a renewable raw material. Architect and civil engineer Wolfgang Winter would design any new building out of wood. There is enough material and the technology to build upwards.

Baumeister: Mr. Winter, we are confused: on the one hand, we hear about a renaissance in timber construction, but on the other hand, timber construction in the city has declined. Which is true?
Wolfgang Winter: A stable market segment has emerged for single-family houses in Central Europe. In multi-storey construction, it is more complicated: in the 70s to 80s, i.e. after the war, there was a market share of zero. In Austria, Germany and Switzerland, state-subsidized campaigns were created at the time to accommodate the returnees from Russia – building was done with wood. These campaigns caused the market share to rise to five percent in the short term. The fact that this figure is now weakening again is due to the lack of funding. The question is: Can ecological measures that cost more than concrete construction be justified at all? This brings up the concept of affordable housing, because expensive construction is not socially sustainable. Then we just build in concrete again. From this perspective, social sustainability excludes ecological sustainability.

B: Does timber construction necessarily have to be more expensive?
W W: In the short term, yes. A cubic meter of concrete costs 50 euros. Wood, on the other hand, costs 400 euros per cubic meter. So if you replace concrete with wood in an equivalent construction project, it is more expensive. That is of course a disadvantage of wood.

B: Where does this big price difference come from?
W W: A cubic meter of tree, as it comes from the forest, costs 100 euros. The price is determined by the forester who cuts the wood and the forest owner who waits 100 years for the tree to grow. If the tree is sawn down, 50 percent is lost through the waste products. This means that a cubic meter costs 200 euros. The wood then has to be dried and glued, tempered and quality sorted. This is always a high cost for a natural product.

B: The solution?
W W: You have to build intelligently. For timber construction in the city, you need a well thought-out system and a quality-assured product. This is not possible in this DIY niche with a regional, “cute” timber construction culture. For large-scale industrial projects with 200 residential units that need to be completed within six months, you need prefabricated products. In terms of price, timber is competing with in-situ concrete poured on site. At the moment, it is still losing this battle.

B: So timber has a lot of competition. Until 1800, things were different – every building was made of wood, at least in part. When exactly did the turning point come?
W W: Until 1800, all construction was “self-build”. People built with the materials that were available on site. Carpenters and bricklayers built without architects. A big break came with industrialization. The crafts disappeared. The railroad, steel and cement arrived.

B: What’s more, in the 19th century there was simply no more wood…
W W: That’s when the laws for sustainable forestry were introduced. From the second half of the 19th century, they stipulated that if a tree was felled, two new ones had to be planted.

B: So we would have enough wood again today. And the “paperless office” will surely ensure even more wood…
W W: The paper thing is not so easy to conclude. In fact, the yields from forests have increased enormously. This is due to properly managed forests. Until the 18th century, yields were five cubic meters per hectare. With forest management, the figure climbed to 10-15 cubic meters per hectare. Due to climate change and the high CO2 content in the air, forests are becoming even more productive.

B: So we would have enough wood to theoretically build entire cities with?
W W: Yes. There is more wood growing than we need. If we wanted to, we could build every new construction project in wood.

B: How high could we build with wood?
W W: Wood has a compressive strength of 30-40 newtons, concrete also has 30 newtons. Of course, it has a lower tensile strength than steel. But this can be compensated for with a higher cross-section. And timber is still relatively light. Pure timber buildings of up to ten storeys are technically possible without any problems, even when fire protection requirements are taken into account. Fire protection is actually a question of escape routes and access and not the combustible material.

B: Especially when we’re talking about urban areas, isn’t there a great risk of fire spreading from one building to another?
W W: Every fire is started by mobile fire loads – the furniture, the curtains. Wooden buildings don’t burn any more than other buildings. Wood does not ignite more quickly, nor is the risk of a fire starting greater than with other building materials. The most important fire protection measure is the escape routes.

B: Timber construction seems to reach its limits at ten storeys. Why then want to build even higher? Shouldn’t we think about the material according to its use?
W W: The tensile forces are the problem. But you can use timber steel for that.

B: Wooden steel?
W W: When we talk about timber-steel construction – steel clad with wood – then it’s the same principle as with reinforced concrete: you have a large cross-section consisting of compression elements, in this case made of wood, and inserted flat bars or angles that absorb the tension. From a structural point of view, all skeleton structures that are currently made of reinforced concrete could be made of wood.

B: What are the biggest advantages of timber in the city?
W W: Wood is an excellent raw material that can be used to make various products. It is easy to process. It also has low thermal expansion due to its high porosity. With other materials, you have to leave more space during installation, or the adhesive has to compensate for the expansion. Wood also has good thermal insulation properties. The advantages in the city lie in building gaps and extensions. The material is light and can be lifted into urban structures by crane.

B: Another major advantage of timber in the city is the high degree of prefabrication. Does this impose restrictions on the design?
W W: I think you can design very freely with wood. Nowadays, wood is machined and glued together. Robots mill out holes and join the wood together. So you can produce parts industrially and individually.

B: No disadvantages?
W W: Of course, it’s clear that if an architect builds monolithically beforehand, this allows for different building forms and requires different thought structures than if you put together an additive system from rods. Prefabricated timber construction requires a certain level of awareness on the part of the architect. If the architect has this knowledge, however, there is certainly freedom of design. The prefabrication of timber and steel is equivalent in the construction process. But wood has a few additional advantages.

B: Sustainability, for example. However, the word is now used everywhere. Has it lost any of its strength as an argument for timber construction as a result?
W W: A lot has been smuggled into the term sustainability: architectural quality, beauty and ecology. Now we no longer talk about sustainability, we talk about resource efficiency. Timber construction itself is clearly resource-efficient. And since we change our building fabric in relatively short cycles, resource efficiency also means what the material makes possible in terms of later use. The monolithic cast construction cannot be dismantled and rebuilt elsewhere. Steel and wood are easier to recycle.

B: Do you think that in a world surrounded by technology, we are longing for a natural building material?
W W: Yes, that is certainly part of it. On the one hand, there is this useful timber construction, but it doesn’t claim to be a statement. Our urban buildings have many half-timbered structures that were subsequently clad. Today, of course, things are different. Since concrete was the building material of the 20th century, if you offer an alternative, you also have to work with a feeling: We now live in a material that is closer to nature. But that will certainly only remain a niche. Eco-awareness is a decisive factor for a maximum of 20 percent of the population. The others don’t care if they live in a concrete building.

B: You said that concrete was the dominant building material of the 20th century. Is wood the building material of the 21st century?
W W: Wood has everything it takes to become the building material of the 21st century. Concrete was the building material of the 20th century, especially in Europe. This has to do with our specific history, with the Second World War. You could argue that the population’s growing environmental awareness is the basis for wood becoming the material of the 21st century. But, of course, you have to see how strongly wood is being fought over by the forestry, paper and pellet industries. The competing players for this natural material must agree that it makes the most sense to build with wood.

Searching for clues on Slate Islands

Building design

The poetry collection "Schiefern" by Esther Kinsky explores the analogy between human memory and metamorphic rock. Photo: Suhrkamp — The poetry collection "Schiefern"

The poetry collection “Schiefern” by Esther Kinsky explores the analogy between human memory and metamorphic rock – a sensual search for the lifeless. On the map, they are small patches off the west coast of Scotland, so small that it is easy to overlook them. You have to seek them out specifically to find them. You don’t just come across […]

The poetry collection “Schiefern” by Esther Kinsky explores the analogy between human memory and metamorphic rock – a sensual search for the lifeless.

On the map, they are small spots off the west coast of Scotland, so small that it is easy to overlook them. You have to seek them out to find them. You don’t just stumble across them. The Inner Hebrides of Scotland, a group of islands at the top of the British Isles, are a popular travel destination. Those who come here long for the original, the wild, the rugged. For the salty wind that catches hair and clothes and makes them stiff. For the Atlantic, its waves crashing against the black rock. Gneiss. Granite. Basalt. Slate.

Esther Kinsky, translator and poet and 2018 for “Hain. Geländeroman” in the fiction category at the Leipzig Book Fair, has dedicated a volume of poetry to slate and the region where the sedimentary rock was mined for centuries with the simple yet telling title “Schiefern”.

The quarries on Slate Islands are still there, as are the remnants of a now defunct industry. Kinsky embarks on a voyage of discovery and wraps her observations of nature in words that are enigmatic to decipher and carry us away to the remoteness of the Inner Hebrides, to the black, raging sea, above which the reader floats like an invisible person in the mental space that Kinsky spins with her words.

It is precisely there, in this space of thought, that the analogies between something thoroughly lifeless and human can be found. There are only a few people in this three-part volume, but it is not lacking in humanity. In fact, it is quite astonishing how sensually it is possible to write about waves carrying spray and “plates with a / surface like petrified quiet waves” without slipping into kitschy romanticism.

“Nature Writing”

Nature has been tempting writers to write about it as the main protagonist since the 18th century. In Anglo-Saxon, “nature writing” is the name given to lavish literary descriptions of trees, meadows, flowers and cloudbursts. In German, the term “Naturpoesie” or “nature poetry” has become commonplace. Esther Kinsky has stood out in literature for years with such nature poetry.

In 2013, she weaved four cycles of poems about decay and growth in “Naturschutzgebiet” (Nature Reserve), based on a neglected city park. If Kinsky’s work is now categorized as “nature writing”, she is happy to contradict this. In an interview with Deutschlandfunk radio, she once said that she did not see herself in the tradition of nature writing. This term is too diffuse, too sprawling in terms of what it encompasses and what it does not. “Nature writing” can be anything, she says. So why not her latest work “Schiefern”, one might ask?

The layers of time

Early on in “Schiefern”, the word “memory” is used “as a space of absences, moved by the transparent hand of unpredictable synapses and imponderable shifts of deposits in the slowly emerging and deepening furrows and folds of the brain”. Kinsky is concerned with the layers of time that accumulate over memories. At first very gently, then more clearly, she draws linguistic parallels between human memory and the preserved history on the surface of the rocks, which the tides and times have passed by over millions of years.

The past is preserved in the stone, it only has to be read from its wrinkles, as if the stone were an old, cherished old man whose weathered face bears the traces of life. Kinsky writes of “signs without hand or foot / in the stone to which no one / knows how to make a rhyme / but the greatest possible past”.

“Schiefern” could be the modern sequel to Adalbert Stifter’s 1853 short story “Bunte Steine” and join the ranks of “Granit”, “Kalkstein” and “Turmalin”. But as treacherously idyllic as Stifter’s detailed, Biedermeier-like depictions of nature are, Kinsky’s description of the Slate Islands is just as uncharitable. The coolness of the surroundings snows through her words. There is a harshness in them that you don’t want to imagine without.

Information about the book

Esther Kinsky: Slates.
D: 24,00 Euro
A: 24,70 Euro
CH: 34.50 Swiss francs
Published: 23.03.2020
Hardcover, 103 pages
ISBN: 978-3-518-42921-1