The summer of 2025 has brought extreme heat across Europe and beyond, with record-breaking temperatures and widespread climate-related impacts. Red alert warnings have been issued in France, Italy, and Spain as temperatures exceeded 46°C in parts of the Iberian Peninsula. These conditions have led to school closures, restrictions on outdoor work, and pressure on urban infrastructure, including power grids and public transport systems. The heatwave has simultaneously intensified wildfire risk across the Mediterranean. In western Turkey, ferocious wildfires near Izmir forced the evacuation of over 50,000 people as high winds and low humidity fueled rapidly spreading flames. In Spain's Catalonia region, two people died in a wildfire that raced across farmland and old structures in Torrefeta on July 1. Similar disasters have occurred in Greece, France, and Italy, with evacuations throughout southern Europe as widespread heat‑induced drought exacerbates fire season intensity.
Extreme heat is one of climate change's most urgent and rapidly growing consequences, especially in cities. Urban areas are particularly vulnerable because they trap heat in building materials and urban streets, creating dangerous conditions for residents. As temperatures continue to rise and heat waves lengthen, cities are grappling with how to remain livable in the face of this intensifying threat.
Urban green spaces are considered one of the most appropriate and accessible ways to mitigate the effects of rising temperatures in urban environments. As the global climate warms, cities worldwide face more frequent and extreme heat waves, putting their citizens at risk. Many cities are employing strategies for reducing the impact of urban heat islands, which are generated when natural land cover is replaced with surfaces that absorb and retain heat, such as pavements and buildings. This raises the temperature by several degrees compared to the surroundings. Cities have their micro-climate, influenced by this phenomenon combined with a series of often overlooked factors. For a climate strategy to be efficient, all factors need to be taken into consideration.
As record-breaking temperatures sweep across European cities, practitioners have recognized that existing infrastructure is poorly equipped to address the impacts of climate change. In response to this concern Roofscapes, a startup emerging from the MIT School of Architecture and Planning, has developed innovative solutions to amplify urban climate resilience. Their approach focuses on the strategic adaptation of underutilized spaces such as rooftops. By tackling the immediate challenges posed by extreme heat, the startup's work epitomizes how architectural innovation can directly contribute to addressing climate adaptation needs in cities. The company was recognized as one of ArchDaily's 2024 Best New Practices for their innovative approach to tackling urban issues such as affordability, lack of biodiversity, rising urban temperatures and repurposing.
Abu Dhabi Climate Resilience Initiative / CBT Architects. Image Courtesy of CBT Architects
As temperatures rise globally, the impacts of urban heat islands—once considered an invisible threat—are becoming increasingly pronounced and ever more dangerous. Despite this mounting threat, however, the public realm which constitutes about 30% of cities offers immense potential to provide respite from scorching heat and introduce new opportunities to improve urban resilience efforts. As global temperatures rise, cities in regions like the United Arab Emirates and India are facing unprecedented challenges in maintaining livable urban spaces.
Eastern and Southern Europe is enduring a severe heatwave, with temperatures reaching over 40 degrees Celsius in many countries including Greece, Croatia, Macedonia, and Romania. Driven by hot air from North Africa, this prolonged heatwave has raised significant threats for residents and has strained the cities’ mechanisms for protection and climate mitigation. As the heatwaves expose the vulnerabilities of urban infrastructures, cities across Europe are striving to implement measures to address these challenges.
Every year, Earth Day, celebrated on April 22, presents us with an opportunity to contemplate the conditions of our planet and our impact upon it. Generating around 37% of global carbon emissions, the construction industry has an important, often detrimental, role to play, thus placing an increasingly urgent responsibility on architects and builders to devise strategies for reducing this number. Still, the built environment represents the habitat for most of humanity, and so it has the potential to protect and shelter people from the risks posed by the changing climate. Read on to discover a collection of articles delving into the strategies available at urban and architectural scales for mitigating the effects of climate change and minimizing the industry’s impact upon it.
Al Khuwair Muscat Downtown - ZHA . Image Courtesy of Oman Ministry of Housing and Urban Planning
Zaha Hadid Architects have unveiled a large-scale project for the redevelopment of the Al Khuwair waterfront in downtown Muscat, the capital of Oman. The $1.3bn project covers an area of 3.3 million square meters. It aims to revitalize the area through sustainability-led design principles to accommodate the expected population growth, which is expected to almost double by 2040. The plans are developed in collaboration with Buro Happold to incorporate and transform the existing buildings on site, introduce coastal and climate resilience measures, and create an efficient transit-oriented infrastructure.
The urban heat island effect occurs when pavements, roads, and buildings absorb the sun's heat and radiate it back, causing the temperature to increase and preventing the city from cooling down. With the growing reliance on cars in cities, the number of urban car park spaces is also increasing to accommodate buildings. This has resulted in the conversion of large areas of pervious land covered with vegetation into impervious hard surfaces for more car parks. The use of materials like asphalt, combined with the lack of shade, reflective steel surfaces of parked cars, and loss of greenery in these extensive car parks, contributes to the amplification of high-temperature effects and extreme heat events, making urban spaces uncomfortable. This transformation is impacting the climate of car-dependent regions and calls for collaborative ideas and efforts to mitigate the negative effects of rising heat.
On November 30, 2023, the UN COP28 climate summit begins in Dubai, the United Arab Emirates. The name stands for the Conference of the Parties under the UNFCCC, and symbolizes the annual meeting of world governments for the purpose of establishing strategies to limit the extent of climate change and its adverse effects. Last year’s summit concluded with several important measures, including the promise of a global fund aimed at providing financial aid to developing countries affected by climate disasters.
The main purpose of COP is to reinforce the commitments of the Paris Agreement, signed in 2015, which strives to keep the global temperature rise under 1.5C degrees. As the construction industry accounts for 39% of global emissions, architecture plays an important role in helping to lower our carbon footprint, making COP28 a crucial event for architects.
The climate crisis has made heatwaves more likely and more intense around the world. Record-breaking high temperatures are being reported across the world. According to international data, the first week of July 2023 was the hottest week on record, putting millions of people in danger. All throughout this summer, recurring heatwaves have been affecting large portions of Asia, Europe, and the United States, priming the land for fires in places like Greece, Spain, and Canada, triggering unhealthy air warnings, evacuations, and heat-related deaths. The increasingly threatening effects of the climate crisis are also felt in cities worldwide, as extreme heat proves to be a rapidly growing health risk to millions of urban dwellers.
Cities are on the front lines of this public health emergency. People living in urban areas are among the hardest hit when heatwaves happen, partly because of urban heat islands. This is a phenomenon that occurs when cities replace the natural land cover with dense concentrations of surfaces that absorb and retain heat, like pavements and buildings. Heat risk levels also vary by neighborhood, with less affluent and historically marginalized sectors being the most affected due to the density of the population, limited access to cooling systems, and the limited availability of green urban spaces.
Climate change has been one of the most pressing topics of this year, and for a good reason. Its effects are visible not only in natural habitats but also in urban environments. The construction industry has an important role to play in this dynamic. Throughout the year, events such as COP27 emphasized the importance of striving to achieve net carbon zero and the challenges faced by developing countries affected by increasingly devastating natural disasters. Possible directions for development include actions at varying stages and scales, from optimizing green spaces for urban heat control to employing local and innovative building materials to minimize the carbon footprint or passing laws that help create more sustainable urban and natural environments.
This article represents a roundup of articles published on ArchDaily during the course of 2022 with themes related to climate change and architecture’s potential to make a difference. It breaks down the topic into four main questions: What Are Cities Doing to Mitigate Urban Heat? How to Tackle Rising Sea Levels? What Was COP27 and Why Does It Matter? Can Building Materials Play a Role in Achieving These Goals? The last section presents an overview of new legislation approved during 2022 as a way of understanding how state and local governments are imposing this need for change.
The Transportation Alternatives and the Massachusetts Institute of Technology have initiated a new digital tool, Spatial Equity NYC, to help users understand how space is distributed and restricted across the neighborhoods of New York City. The tool asses the use of streets, sidewalks, and public spaces, as they are key factors that influence data such as pollution, traffic fatalities, accessibility, or air quality. The data collected shows a direct correlation between neighborhoods with low-income communities and communities of color and the detrimental ways in which public space is used, leading to health and mobility issues in those communities.
Kuwait is planning a 1,600-hectare development that will provide residential units, jobs, and amenities for 100,000 residents. Developed by URB, the ambitious project aims to promote a sustainable lifestyle with high standards of living, yet a low impact on the environment. The masterplan for the smart city is designed to optimize density and amenities distribution to create a walkable city, while also optimizing the green space ratio. This will help mitigate the effects of rising temperatures and the urban heat island effect. The green transportation systems and dedicated cycling tracks will make this a car-free city, apart from a ring road that allows for limited vehicular access. The city also promotes a circular economy that aims to provide food and energy security for the residents.
Cities across the Northern Hemisphere are preparing for the upcoming summer months, which are expected to be warmer and drier than average. The European Center for Medium-Range Weather Forecasts warns about temperatures rising above the norm in central and southern Europe this summer. Similarly, the forecast for the Unites States predicts hotter weather and below-average rainfall likely to fuel a megadrought. This poses threats for citizens, especially in larger cities, where heat-absorbing asphalt and waste heat generated by energy use create a “heat-island” effect. It translates to temperatures being up to 10°F (5.6°C) warmer in cities compared to the surrounding natural areas.
Prolonged heatwaves have been increasingly common in recent years, and cities are devising various strategies for combating the urban heat island effect. As Sydney experienced blistering summer temperatures of up to 50 degrees Celsius, the authorities have recently banned dark roofs on new homes and mandated lighter-coloured alternatives to reflect solar radiation. In Europe, Athens has taken the example of Miami and hired a Chief Heat Officer, tasked with finding coping strategies as the city confronts with heatwaves and wildfires that prompted a large number of residents to vacate the capital.
Bryggervangen and Sankt Kjeld’s Square in Copenhagen. Image Courtesy of SLA
For this month, The Dirt and author Jared Green share with us a study about urban heat islands, exploring new approaches that have been designed to both reduce urban temperatures and help communities adapt to a hotter world, In three cities: New York City, Copenhagen, and Abu Dhabi.
https://www.archdaily.com/962913/urban-heat-islands-are-increasingly-dangerous-but-planners-and-designers-have-solutionsJared Green
