In Eastern Attika study area, a fire started in the early afternoon of Monday 23rd of July, on Penteli Mt., northeast of Athens and 5 km to the west of the Eastern Attica coastline, evolving to one of the most catastrophic Wildland-Urban Interface fires, with about 100 casualties and significant structure damages. The cause of the wildfire remains officially unknown. The fire propagated very fast to the east in an unexpected manner, due to the strong west and dry wind, which is very rare in the area, destroying a major part of the settlements of Neos Voutzas and Mati, where finally stopped at the coast three hours of burning. The fire service responded by sending 60 persons on 24 vehicles, 15 vehicles belonging to registered volunteers, 2 ground forces teams, as well as 3 Canadair aircrafts and a helicopter. Organized evacuation operations took place at a church charity institution (Lyreion) and all children summer camps of the wider area, but no evacuation actions were taken by the authorities for the most affected areas of Mati and Voutzas.