Announcement: Workshop on ‘Large Outdoor Fires and the Built Environment’ (LOF & BE 2020) *Sayaka Suzuki, National Research Institute of Fire and Disaster (NRIFD), Chofu, Tokyo, Japan Sara McAllister, USDA Forest Service, Missoula, MT, USA Samuel L. Manzello, National Institute of Standards and Technology (NIST), Gaithersburg, MD, USA The ‘Large Outdoor Fires and the Built Environment’ or LOF & BE working group, sponsored by the International Association for Fire Safety Science (IAFSS) is attempting to address problems with key phenomenological shared characteris- tics relevant to urban fires, wildland-urban interface (WUI) fires, wildland fires, and informal settlement fires [1]. The LOF & BE permanent working group con- sists of three subgroups, prioritized into the following topics [2]:  Ignition Resistant Communities (IRC)  Emergency Management and Evacuation (EME)  Large Outdoor Firefighting (LOFF) The IRC subgroup is being co-led by Daniel Gorham (IBHS, USA) and David Rush (UoE, UK). The EME group is being co-led by Maria Theodori (Reax Engineering, USA) and Sayaka Suzuki (NRIFD, Japan). The LOFF subgroup is being led by Len Garis (UFV, Canada), Brian Lattimer (Virginia Tech, USA), and Xinyan Huang (HKPolyU, China). The overall objectives are to bring the full depth of knowledge of the IAFSS community to work on these priority topics [2]. In this workshop, followed by two previous workshops [3, 4], we will present why large outdoor fires are the important issue in the world, what this working group is doing about it, and what our progress is so far. As problems being addressed by IRC, EME, and LOFF subgroups are complex and interdisciplinary, the planned workshop will devote a half day to the follow- ing topics (see Table 1):  What research has been done so far on this problem? Fire safety science com- munity research efforts on Large Outdoor Fires and the Built Environment * Correspondence should be addressed to: Sayaka Suzuki, E-mail: sayakas@fri.go.jp Fire Technology Ó 2020 Springer Science+Business Media, LLC, part of Springer Nature Manufactured in The United States https://doi.org/10.1007/s10694-020-00951-9 1