Disaster http://purl.bioontology.org/ontology/MESH/D004190 Natural Disasters Sufficient SCDO:0000388 Natural Disaster MESH:D004190 Sudden calamitous events producing great material damage, loss, and distress. They are the result of natural phenomena such as earthquakes, floods, etc. Calamities producing great damage, loss of life, and distress. They include results of natural phenomena and man-made phenomena. Normal conditions of existence are disrupted and the level of impact exceeds the capacity of the hazard-affected community. Disasters Physical Environment