From the Document: "Edgewater Elementary School is located in an area that, according to the U.S. Geological Survey (USGS), has a high probability of experiencing an earthquake. In many parts of Oregon, earthquakes are a serious threat and can strike without warning. We must be prepared for an earthquake in the state, as well as one occurring offshore in the Cascadia subduction zone. If this were to occur, it could severely damage not only the school, but a lot of Oregon's infrastructure. We expect that roads could be impassible, bridges severely damaged, and utilities destroyed, and it may be weeks or months before this infrastructure is repaired. Mitigating potential hazards before an earthquake strikes, being prepared to take protective measures when the ground shakes, and preparing to meet the immediate and short-term needs of students and staff members following an earthquake are essential elements in our 'Earthquake Annex.'"
Readiness and Emergency Management for Schools Technical Assistance Center: https://rems.ed.gov/