This study clarifies different issues associated with temporary emergency shelters called <i>Agariyas</i> during floods, in the Kumano, area along the Kumano River in Wakayama Prefecture, Japan. The locations and features of <i>Agariyas</i> were identified through fieldwork. To collect and confirm the location and past existences of <i>Agariyas</i>, interviews were conducted with the elderly. Also, a measurement survey was used to collect data on the types, location, floor plan, and material use of <i>Agariyas</i>. The study confirmed that many <i>Agariyas</i> were built after the 1889 flood, the water level of which influenced their locations. However, currently, very few remain. They were mainly minimally furnished with one to two rooms, a storage space, and a small kitchen for a temporary evacuation period. They were built on terraces or mounded ground. Their architectural features differ depending on the owner, but they were most commonly built using wood, and the roof was covered with cedar bark and rounded stones. Younger generations do not know about <i>Agariyas</i>. To increase the local knowledge and awareness of flood disaster culture, it is important to re-evaluate the tangible and intangible heritage in local communities, which includes the effort and wisdom of ancestors related to local disasters. The Kumano-Hongu Shrine and pilgrimage route attract visitors today. However, addressing the experiences and knowledge of local disaster may add value to the World Heritage site.