Source: European Union 2 Published on: 2026-06-26
Rockets. Astronauts. Distant planets. That is what most people picture when they hear “space programme.” What they do not picture is their own street. Yet that is increasingly where Europe’s investment in space delivers tangible benefits.
As heatwaves arrive earlier, last longer, and occur more frequently, Copernicus data has quietly become part of the toolkit cities use to adapt. It helps local authorities identify urban heat islands, map hotspots across metropolitan areas, monitor vegetation cover, and assess whether cooling measures are working.
Projects such as CURE and now CLMS Cities exist to turn this kind of information into something a planner can actually use on a Tuesday morning, rather than a dataset that sits in a research archive. Funded under Horizon Europe and managed by the European Health and Digital Executive Agency, the project supports cities participating in the EU Mission for Climate Neutral and Smart Cities as they integrate Copernicus products into their planning processes.
The Science Behind Urban Heat is not complicated
Cities become hotter than the countryside around them, and the difference is often greatest at night, when roads, roofs and pavements slowly release the heat they absorbed during the day. In cities such as London and Paris, that difference can reach around 4°C between the city centre and surrounding rural areas after dark, and similar patterns can be observed across European capitals, Brussels included. During severe heatwaves, the contrast can become even more pronounced, sometimes reaching 10 to 15°C. What Copernicus adds is the ability to see these patterns clearly, neighbourhood by neighbourhood, rather than relying on the general impression that the city centre somehow feels less comfortable in August than it used to.
A recent Copernicus Sentinel-3 image (see also the pictures below) vividly illustrates this in Brussels, the urban heat island effect during the late June 2026 heatwave, where urban areas appear significantly warmer than surrounding green spaces. Such data helps cities pinpoint where interventions are most needed.
Proven Solutions, Measurable Results
Some of the solutions are already well understood and, importantly, already measured rather than assumed. A study using satellite temperature data across nearly 300 European cities found that tree covered areas are between 0 and 4°C cooler than dense urban fabric in southern Europe, and as much as 8 to 12°C cooler in central Europe during summer heat extremes. Green roofs and other nature based solutions are showing similar results in practice. A school retrofit programme in Spain and Portugal reduced indoor temperatures by between 4 and 6°C while lowering cooling related electricity consumption by more than 11%. Antwerp introduced requirements for green roofs after heat mapping identified the areas of greatest vulnerability, and Innsbruck used similar analyses to determine where sealed surfaces should be removed, where additional shade was needed and where public drinking fountains would provide the greatest benefit. None of this is a pilot study sitting in a drawer somewhere, it is already shaping the rules cities build under.
What this points to is not really a knowledge gap, since most cities already have a decent sense of what cools a street down. What they are short of is a reliable, granular answer to a narrower and more political question: which street first and is it worth the financial cost of acting there before somewhere else. That narrower question is where Copernicus earns its place, by giving planners something more useful than intuition: comparable and regularly updated evidence showing which districts experience the highest heat stress, where shade is lacking and where additional tree cover, different surface materials or improved ventilation corridors are likely to deliver the greatest benefit. In Milan, for example, planners used a Copernicus based heat risk model to identify one particular street as unusually vulnerable during heatwaves and were able to intervene precisely where action was needed, instead of applying generic measures uniformly across the entire city.
CURE proved the concept under Horizon 2020, combining all four Copernicus Core Services into eleven city level applications, tested across ten cities including Berlin, Copenhagen and Bristol. One of those applications mapped thermal comfort street by street, the same kind of data that let Milan target one vulnerable street instead of guessing city wide. The goal was never another dataset sitting in an archive. It was proof that Copernicus could answer a planner’s real question: where exactly, and how badly.
CLMS Cities picks up from there, with a sharper focus. It takes the method CURE built and feeds it into the Copernicus Land Monitoring Service, refined to track progress under the EU Climate Neutral and Smart Cities Mission. Cities in that Mission face a 2030 deadline, and good intentions will not get them there. They need proof that the trees, green roofs and surface changes they fund are actually working, year after year, city by city. Together, the two projects make sure a method built once does not have to be rebuilt every time, whether it is applied in Vitoria Gasteiz, Mannheim or Stockholm.
A Tool for Decision-Makers
Europe is not short of Earth observation data, Copernicus and the wider EU Space Programme already produce an extraordinary amount of it. The harder problem is getting that information onto the desk of the person actually deciding where the trees go, in a form that can be used without requiring specialist expertise to interpret it.
Most people still picture Copernicus as a system for watching the planet from orbit, and for a long time that is mostly what it was. It is becoming something closer to a decision support tool now, helping identify which neighbourhoods need additional shade, where new tree cover will have the greatest impact and where investments in adaptation can protect the largest number of citizens.
The Urgency of Adaptation
Europe is warming faster than any other continent, and its cities will need to adapt accordingly. The real question is no longer whether adaptation is necessary. It is whether we make full use of the tools that are already available to us.
None of that happens automatically. Somebody still must look at the map, pick the street, and some in the city hall need to find the budget line. Copernicus and projects managed by HaDEA can tell you where.
• Horizon Europe Cluster 4: Space