## 4 Results  
### Burned Areas and Burn Severity  
The total burned area of the four wildfires in Attica during the 2021 fire season reached 243.98 km\({}^{2}\) making evident the large extent of damage caused to the region. As Figure 3 presents, the wildfire in Vilia burned the largest area reaching almost 96 km\({}^{2}\), followed by Varympomppi with 78.95 km\({}^{2}\), Schinos with 64.05 km\({}^{2}\), and Lavreotiki that has a burned an area of 5 km\({}^{2}\). Figure 3: Burn Severity of 2021 Attica region wildfires: (**a**) Schinos; (**b**) Varympomppi; (**c**) Vilia; (**d**) Lavreotiki. The burned area classification based on burn severity is illustrated including the percentage of the burned area total of each area per class. Analyzing the burn severity of these wildfires, generally the impact was severe enough with the moderate-high severity accounting for 53.69% or 131 km\({}^{2}\) out of the total burned area with the moderate-low (28.36%) and low (17.8%) following, while high severity covers 0.14%. More specifically, considering each area based on Figure 3, it is evident that the moderate-high severity characterizes all the burned areas except Lavreotiki, where lower severity levels prevail, whereas in Schinos a mostly close-to-equal distribution is observed among burn severity levels. It should be noted that in the cases of Varympompi and Vilia, the percentages of burn severity levels coverage in each case follow an almost identical pattern in the moderate severity levels percentage. Regarding the affected land cover based on CLC 2018 as presented in Figure 4 and Table 4, the total numbers show that the third CLC category which includes forests, shrubs, and/or herbaceous vegetation is heavily impacted by the wildfires covering 82.71% or 201.8 km\({}^{2}\) of the total burned area, thus highlighting the ecological disaster in the region. To put it another way, coniferous forests (72.48 km\({}^{2}\)), sclerophyllous vegetation (52.47 km\({}^{2}\)), transitional woodland-shrub (46.13 km\({}^{2}\)), and mixed forests (24.73 km\({}^{2}\)) comprised the most affected land cover. In Schinos, the burned area consisted of 62.80% of coniferous forests, in Varympompi transitional woodland-shrubs and mixed forests took up 46.60%, although it should be mentioned that a significant part of the artificial surfaces category was impacted in the region reaching 9.56% of the total burned area, including discontinuous urban fabric. Continuing with Lavreotiki, coniferous forests, natural grasslands, and sclerophyllous vegetation accounted for 64.44% of the total burned area, and lastly, in Vilia Sclerophyllous vegetation was 49.21% of the burned area. Figure 4: Burned land cover of Attica region wildfires based on Corine Land Cover 2018: (**a**) Schinos; (**b**) Varympomppi; (**c**) Vilia; (**d**) Lavreotiki. The third level of Corine Land Cover 2018 was utilized and clipped to each burned area to assess the affected land cover. The correlation between burn severity and land cover led to useful findings. More analytically, transitional woodland-shrubs were the main land cover category characterized by high severity along with broad-leaved forests. Moderate-high severity existed mostly in coniferous forests (41 km\({}^{2}\)), schlerophyllous vegetation (30.96 km\({}^{2}\)), and transitional woodland-shrub (28.65 km\({}^{2}\)). In Vilia, 28.49 km\({}^{2}\) of schlerophyllous vegetation belonged to this burn severity level as well as 19.3 km\({}^{2}\) of coniferous forests in Schinos, 12.31 km\({}^{2}\) of mixed forest in Varymomppi, and 0.79 in Lavveotiki accordingly. Regarding moderate-low severity, this was found in coniferous forests (18 km\({}^{2}\)), schlerophyllous vegetation (15.57 km\({}^{2}\)), and transitional woodland-shrubs (11.5 km\({}^{2}\)). In each area, the following prevailed: the schlerophyllous vegetation of Vilia (13.5 km\({}^{2}\)), coniferous forests of Schinos (10.27 km\({}^{2}\)), transitional woodland-shrubs of Varymomppi (4.26 km\({}^{2}\)), and schlerophyllous vegetation of Lavveotiki (0.6 km\({}^{2}\)).