Successful wildfire prevention relies on a mix of structural interventions and organisational measures. Structural measures entail fuel and ecosystem management, which reduce wildfire risk and severity by controlling the quantity and characteristics of combustible materials across the landscape. These include buffer zones, fuel breaks (i.e. strips of non-flammable land near settlements or across the landscape), prescribed fires, and the active use of fire for the disposal of forestry and agricultural residues and for pasture renewal (i.e. waste and extensive burns) (Presidency of the Council of Ministers, 2017[25]) (Ministry of Agriculture, 2014[26]). In contrast, organisational measures include land-use rules and building codes or standards. Land-use planning can limit new development in fire-prone areas. Building regulations govern the construction of assets such as houses and infrastructure to enhance fire resilience (OECD, 2023[5]).
Following the 2017 fires, evaluations found that regulations for implementing both structural and organisational risk reduction measures were ineffective. Although buffer zone regulations were already used in Portugal well before 2017, roadside fuel breaks were under-dimensioned and often poorly maintained (Independent Technical Commission, 2018[7]). Additionally, compliance with buffer zone regulations around individual structures and population centres was almost inexistent. In addition, fuel breaks were often conceived in silo instead of as part of a comprehensive landscape-scale fuel management plan, reducing their efficiency (Independent Technical Commission, 2018[8]). Waste or extensive burns were also used previously, but gaps in enforcement and timing restrictions for agricultural burns were at the source of fire ignitions, including the 2017 fires (Independent Technical Commission, 2018[8]). Similarly, landscape-level prescribed fires were already permitted prior to 2017, but their adoption was low especially in areas characterised by high wildfire hazard levels. Building regulations focused on construction materials and equipment used inside of buildings for fires originating with the building’s walls.
Regulations have been strengthened since 2017. Criteria to impose buffer zone regulations around buildings have been strengthened to clarify priority areas (e.g. within a range of 50 metres around isolated structures and within 100 metres from human settlements including ten or more houses). Penalties for non-compliance have doubled since 2018. Prescribed fires are not allowed in zones characterised by a “very high” or “maximum” hazard level according to the fire danger map or when weather conditions are conducive to fire (Presidency of the Council of Ministers, 2021[27]). Finally, while pre-2017 construction standards focused on internal fire resistance, recent code revisions aim to better protect exterior walls from wildfires and extreme heat. However, these requirements currently apply only to new buildings.
To promote regulatory compliance, Portugal has invested in public awareness campaigns. The Portugal Chama campaign targets both public and private stakeholders, raising awareness on fire prevention measures that can be undertaken at the local level to reduce wildfire risk (OECD, 2023[5]). These include, for example, vegetation clearance around properties, moving firewood stacks away from buildings, installing non-flammable flooring strips around homes to create buffer zones, and requesting permits for controlled and waste burns. The campaign also informs the public about the applicable fines for non-compliance to deter risky behaviours. In addition, the “Safe Village, Safe People” programme, also launched after the 2017 wildfires, seeks to reduce wildfire risk through behavioural change and public education. It combines prevention measures (e.g. fuel management, emergency shelters, evacuation routes) with self-protection measures (e.g. awareness raising, evacuation training) (ANEPC, 2026[28]).
New digital tools facilitate the implementation of preventive regulations. A digital platform has been created to allow private stakeholders to request municipal authorisation for waste and extensive burns, supported by funding and technical assistance. For extensive burns, the national forest office (ICNF) ensures they are conducted under the supervision of experts. The platform serves as a valuable tool to identify potential ignition sources and anticipate fire spread. Similarly, the platform SOS Ambiente e Território enables citizens to report violations of environmental and land-use regulations. An arsonist programme was launched to better understand the drivers of arson, which still accounts for an estimated 40% of ignitions (AGIF, 2025[10]), and to develop strategies to reduce recidivism.
The regulatory framework has been further enhanced through targeted inspections, enforcement and improved monitoring. Each year, high-risk parishes – subdivisions of a municipality – are identified using data on ignitions, unburned area, and the national hazard map to guide fuel management inspections by the National Republican Guard (GNR) and municipalities. Advanced tools, including satellite imagery and digital mapping are increasingly employed to detect insufficient vegetation management and unauthorised burns, improving enforcement accuracy. Surveillance has been reinforced through more frequent patrols, while the waste and burn registration platform enables near real-time monitoring and targeted interventions. With technical and logistical support from ICNF, the GNR and the Judiciary Police have expanded their workforce of trained fire investigators to identify ignition sources and track behaviours such arson or accidental burns, informing enforcement strategies. IRFMS entities responsible for fuel breaks and regulatory oversight – ICNF, GNR, and subnational authorities – collect and report compliance data annually, enhancing the effectiveness and accountability of wildfire risk reduction measures.