Barcelona’s El Raval district is among the city’s most heat-exposed neighborhoods, where residents face high temperatures and few ways to find relief. Dense population and narrow streets, compounded by a shortage of green spaces, leave many families, especially those in small, overcrowded apartments, with few ways to stay cool during heatwaves. Municipal data puts the district’s population density at more than 43,000 inhabitants per square kilometer, nearly triple Barcelona’s citywide average.
For Ayla Tribu, a mother of five-year-old twins who lives on Joaquín Costa street, summer means daily searches for cooler spots outside her home. Her 40-square-meter apartment, which she shares with five others, has no air conditioning and malfunctioning fans. Ayla often takes her children to the plaza de les Caramelles, one of the few nearby places where they can cool off in public showers. When temperatures soar, she says, staying inside is simply not an option.
Research from the Universitat Politècnica de Catalunya (UPC), led by architect Helena Coch Roura, highlights El Raval’s vulnerability. The study found that one in four Barcelona households is at risk during heatwaves, with El Raval among the worst-affected areas because of its urban density and poor natural ventilation. Limited access to climate shelters adds to the risk. Coch says the district’s urban layout, marked by subdivided apartments and limited cross-ventilation, worsens the problem and makes it harder for buildings to release heat at night. The district’s housing conditions also sit within a wider city health burden: a 2026 study published in Nature Health estimated 1,842 heat-associated deaths in Barcelona over the summer, including about 1,587 attributed to human-caused warming.
Those figures are statistical estimates of excess mortality associated with extreme temperatures, not a count of individual death certificates or proof that heat was the sole cause in each case. The study’s attribution approach compared observed heat exposure with conditions in a counterfactual climate less affected by fossil-fuel emissions. Its citywide estimate underscores Barcelona’s heat risk, but it is not a mortality count for El Raval.
One proposed solution is to make better use of rooftops, as in North African cities where open terraces provide natural ventilation after sunset. In El Raval, but, many residents say rooftop access is restricted or permanently closed, limiting their ability to escape the heat. Coch suggests that opening these spaces could offer a practical, community-based way to cope with nighttime temperatures, but acknowledges that implementation remains inconsistent.
During the day, the city promotes climate shelters as a basic resource, but many locals either do not use them or find them unsuitable. Ayla says that although she sometimes passes through the MACBA museum, she feels uncomfortable staying there with young children. Shelter accessibility and awareness have become local political issues, with residents urging the city council to extend opening hours and improve communication about available spaces. Deputy mayor Albert Batlle responded that while the city cannot provide a shelter or fan on every corner, numerous public and private spaces offer some respite. He recalled that, decades ago, his own relatives would spend summers in department stores such as El Corte Inglés to escape the heat.
The Barcelona estimate is part of a broader pattern across Spain and Europe. The same research estimated 6,824 heat-associated deaths across 90 Spanish cities from June to August 2026, including 5,227 attributed to human-caused warming. Across Europe, it estimated more than 50,000 heat-associated deaths during the analyzed summer, with about two-thirds linked to climate change. Barcelona ranked second among the European cities analyzed, behind Milan, showing that severe heat-related mortality is not confined to inland areas traditionally associated with hotter conditions.
El Raval’s situation is not unique in Spain, where other urban centers also face rising temperatures and limited infrastructure for heat relief. Adapting older, densely built neighborhoods to modern climate realities is a growing concern for city planners and residents. Social inequality and access to impressive services have also been highlighted elsewhere in Catalonia, including in reports on education disparities. For example, a recent analysis of Catalonia’s education system pointed to persistent gaps that mirror challenges faced by vulnerable communities like those in El Raval.
As climate change drives more frequent and intense heatwaves, Barcelona’s most densely populated districts will remain at the forefront of adaptation efforts. Debate centers on how cooling spaces and communal rooftops can protect residents’ health and quality of life, alongside efforts to improve building ventilation. Barcelona has expanded its network of climate shelters in recent years, but awareness and accessibility remain uneven, particularly for families with young children and people living in overcrowded conditions.
Much of El Raval’s housing stock has been subdivided into smaller units, further limiting natural airflow. The city’s experience reflects broader trends across southern Europe, where adapting urban areas to extreme heat is becoming a critical public health and social equity issue. For residents with few ways to cool their homes, the availability of public spaces matters, as do their locations and opening hours. Those factors can determine whether relief is practically within reach during a heatwave.
