Search Results (8)

Wildfires are affecting natural ecosystems worldwide, causing economic and human losses and exacerbated by climate change. Models of fire severity and fire susceptibility are crucial tools for fire monitoring. This case study analyses a fire event on 3 September 2019 in Vilcabamba parish, Loja province, Ecuador. This article aims to assess the severity and susceptibility of a fire through spectral indices and multi-criteria methods for establishing a fire action plan proposal. The methodology comprises the following: (i) the acquisition of Sentinel-2A products for the calculation of spectral indices; (ii) a fire severity model using differentiated indices (dNBR and dNDVI) and a fire susceptibility model using the Analytic Hierarchy Process (AHP) method; (iii) model validation using Logistic Regression (LR) and Non-metric Multidimensional Scaling (NMDS) algorithms; (iv) the proposal of an action plan for fire management. The Normalised Burn Ratio (NBR) index revealed that 10.98% of the fire perimeter has burned areas with moderate-high severity in post-fire scenes (2019) and decreased to 0.01% for post-fire scenes in 2021. The Normalised Difference Vegetation Index (NDVI) identified 67.28% of the fire perimeter with null photosynthetic activity in the post-fire scene (2019) and 5.88% in the post-fire scene (2021). The Normalised Difference Moisture Index (NDMI) applied in the pre-fire scene identified that 52.62% has low and dry vegetation (northeast), and 8.27% has high vegetation cover (southwest). The dNDVI identified 10.11% of unburned areas and 7.91% using the dNBR. The fire susceptibility model identified 11.44% of the fire perimeter with null fire susceptibility. These results evidence the vegetation recovery after two years of the fire event. The models demonstrated excellent performance for fire severity models and were a good fit for the AHP model. We used the Root Mean Square Error (RMSE) and area under the curve (AUC); dNBR and dNDVI have an RMSE of 0.006, and the AHP model has an RMSE of 0.032. The AUC = 1.0 for fire severity models and AUC = 0.6 for fire susceptibility. This study represents a holistic approach by combining Google Earth Engine (GEE), Geographic Information System (GIS), and remote sensing tools for proposing a fire action plan that supports decision making. This study provides escape routes that considered the most significant fire triggers, the AHP, and fire severity approaches for monitoring wildfires in Andean regions. Full article

This study aimed to explore differences in the perceptions of professional and voluntary firefighters regarding the extreme wildfire events that occurred in Portugal in 2017. We collected a sample of 185 participants, professional and voluntary firefighters, who directly participated in suppression activities for the Pedrógão Grande and October 2017 wildfires in Portugal. They were on duty in 149 fire stations in the Central Region of Portugal. A questionnaire was sent via Google Form to participants, based mainly on close-ended and two open-ended questions. It was structured into topics concerning the characteristics of wildfire events, the problems that occurred during the suppression activity, the emotional response of participants to the events, the lessons learned, and the consequences. We found significant differences between the two groups in their perception of wildfire characteristics and their perception of the worst fires they had ever experienced. Some differences were found in their discussion of the suppression phase and their emotional response to fires. On the contrary, the two groups appear to be homogeneous when it comes to no significant changes after the deadly 2017 experience in terms of the fight against rural fires, organization, training, prevention, and careers. The results underline the inadequacy of the suppression model vs. extreme wildfire events, and also its limits from the point of view of psychological reactions and the perception of management problems occurring in extreme and complex events. There is a research gap and no examples in Portugal about the perception of firefighters of the complex flow of activities that characterize the suppression operation of extreme wildfire events. Our research fills this gap. Full article

Spatial planning potential for reducing natural risks including wildfires is widely recognized. This research is focused on Portugal, a wildfire-prone country in southern Europe, where the competencies for spatial planning lie on four geographical levels: (i) the national and regional levels, with a strategic nature, set the general goals or the agenda of principles for spatial planning and (ii) the inter-municipal and municipal levels use regulative land-use planning instruments. There is a trend to bring together spatial planning and wildfire management policies. Thus, this paper aims to identify which are the main difficulties and which are the major opportunities, regarding the implementation of the new Integrated Management System for Rural Fires (IMSRF) and the challenge of integrating wildfire risk reduction in the Portuguese spatial planning framework. Through a survey of municipal professionals with experience in applying the legislation of both policies, the major difficulties and the opportunities of alignment of these two spheres are identified, which can be extrapolated for the whole country or countries in a similar context. Full article

In terms of researching fire-related structure loss, various factors can affect structure survival during a wildfire. This paper aims to assess which factors were determinants in house resistance in the specific context of a case study of an extreme wildfire in the Central Region of Portugal and therefore which factors should be taken into account in the definition of a municipal mitigation strategy to defend buildings against wildfires. In this context, it is possible to conclude that various factors presented a predominant influence, some in building destruction and others in building survival. The existence of overhanging vegetation and lack of defensible space constitute major factors for structure destruction. the inherent wildfire severity, the location in the forest area, and the structure’s isolation from major roads were equally important factors that induced house destruction. Building survival was determined by its increasing distance from the forest and by its location in a dense urban agglomeration. Thus, a strategy to enhance resilience should include the prohibition of roof overhanging vegetation and the restriction of building permits in forest areas, in isolated locations, and/or very far from major roads. These orientations can be extrapolated to municipalities with similar susceptibility and vulnerability to wildfires. Full article

In 2017, Portugal lived through its most infamous extreme wildfire season with 117 fatalities, hundreds of injured people, 3588 destroyed structures, an official cost of 1456 million euros, and 539,920 ha of burned area. Among the legislative and institutional changes prompted by the 2017 events, the “Safe Village” and the “Safe People” programs were established in 2018 (Council of Ministers Resolution no. 157-A/2017) with the purpose of: (i) implementing structural measures to protect people, goods, and buildings in the wildland–urban interface and (ii) developing awareness-raising actions on the prevention of risk behavior and self-protection measures aimed at specific audiences. There is interest in understanding how this program has been implemented, in identifying the strengths and barriers to its implementation, and in evaluating how this program is changing attitudes and behaviors of homeowners in wildfire risk reduction and preparedness as well as in coping with a wildfire. An online survey was sent, between November 2021 and June 2022, to the 139 municipalities that implemented the programs. The response rate was 81% (112 municipalities). To understand the involvement of citizens in this program and its efficacy, we surveyed 51 homeowners in 5 villages in the north and center of Portugal. Our results highlight distinctive local and contrasting dynamics of the programs, related with the interest of local authorities on their implementation and maintenance, and in citizens’ involvement. Recognizing the importance in reducing wildfire risk and improving the citizens’ safety, recommendations on the legal context, the characteristics of the programs, and implementation and maintenance procedures are proposed. They are aimed at enhancing the efficacy in different geographical contexts, namely, proposing initiatives that are much beyond the scope of the “Safe Village” and “Safe People” programs. Full article

Forest fires causes and motivations are poorly understood in southern and south-eastern Europe. This research aims to identify how experts perceive the different causes of forest fires as defined in the classification proposed by the European Commission in 2013. A panel of experts (N = 271) was gathered from the EU Southern Member States (France, Greece, Italy, Portugal, and Spain) and from Central (Switzerland) and south-eastern Europe (Croatia, Serbia, Bosnia and Herzegovina, Republic of North Macedonia, and Turkey). Experts were asked to answer a questionnaire to score the importance of the 29 fire causes using a five point (1–5) Likert Scale. Agricultural burnings received the highest score, followed by Deliberate fire for profit, and Vegetation management. Most of the events stem from Negligence, whereas malicious fire setting is arguably overestimated although there are differences among the countries. This research demonstrates the importance of different techniques to enhance the knowledge of the causes of the complex anthropogenic phenomenon of forest fire occurrence. Full article

Every year worldwide some extraordinary wildfires occur, overwhelming suppression capabilities, causing substantial damages, and often resulting in fatalities. Given their increasing frequency, there is a debate about how to address these wildfires with significant social impacts, but there is no agreement upon terminology to describe them. The concept of extreme wildfire event (EWE) has emerged to bring some coherence on this kind of events. It is increasingly used, often as a synonym of other terms related to wildfires of high intensity and size, but its definition remains elusive. The goal of this paper is to go beyond drawing on distinct disciplinary perspectives to develop a holistic view of EWE as a social-ecological phenomenon. Based on literature review and using a transdisciplinary approach, this paper proposes a definition of EWE as a process and an outcome. Considering the lack of a consistent “scale of gravity” to leverage extreme wildfire events such as in natural hazards (e.g., tornados, hurricanes and earthquakes) we present a proposal of wildfire classification with seven categories based on measurable fire spread and behavior parameters and suppression difficulty. The categories 5 to 7 are labeled as EWE. Full article