Barcelona Regional, the technical agency of the Área Metropolitana de Barcelona, has introduced a digital tool to help pedestrians handle the city while limiting their exposure to extreme heat. Still in beta and available only on the web, the route finder calculates the coolest walking paths between two points, factoring in shade and tree cover alongside traffic levels. The initiative comes as Barcelona faces increasingly frequent heatwaves, making daily commutes on foot a challenge for many residents.
The tool evaluates each street segment using two basic criteria: a 'freshness index' and a 'walkability index.' The freshness index considers total sun exposure and tree shade, while also accounting for green spaces within a 30-meter radius. The walkability index measures sidewalk width and the share of pedestrian space relative to roadways, then factors in average daily vehicle traffic. Each suggested route receives a score from 0 to 100 for both indices, as well as an overall comfort rating.
During a demonstration at the AMB headquarters, technical lead Elena Lacort explained that the system sometimes avoids streets that appear green and shaded but are penalized for heavy traffic, such as the paseo de Sant Joan. Some routes, by contrast, may divert away from iconic areas like the Sagrada Familia, where the immediate surroundings are dominated by concrete and asphalt, intensifying the heat. The tool also highlights pedestrian-friendly zones like the superilla de Consell de Cent, while avoiding sections next to busy roads.
The launch event, titled 'El calor en el Área Metropolitana de Barcelona: saber y acción,' brought together local mayors and municipal experts to discuss how to adapt urban mobility to rising temperatures. Guille López, CEO for Climate Action at AMB and a Barcelona city councillor, stressed the importance of integrating sustainability metrics into mobility planning. He called for public access to walkability and freshness data, and encouraged other operators to build these factors into their own systems.
Barcelona's wider climate policy also includes measures focused on buildings. In October 2026, the city announced two residential rehabilitation programs intended to improve climate comfort, decarbonization and energy efficiency. They are separate from the pedestrian route finder.
Barcelona's approach reflects a broader trend in European cities, where authorities are seeking new ways to protect residents from the health risks of extreme heat. The focus on pedestrian comfort and safety matters in a city where walking remains the primary mode of transport for many. Similar concerns have prompted organizers of major events, such as the Tour de France, to adopt high-tech cooling measures for participants, as detailed in this recent report on heatwave adaptations in France.
The Barcelona route finder is still being tested and is not yet available as a mobile app. Its development points to a possible shift in how cities address urban heat in the coming years. Integrating real-time environmental data into everyday mobility tools could become standard in metropolitan planning, especially as climate change continues to intensify summer temperatures across southern Europe. The project offers a glimpse of how technology and urban design can make city life more bearable during the hottest months.
