The 2 most common types of mass casualty events are natural disasters (eg, hurricanes) and mass interpersonal violence (eg, terrorist attacks).1 The psychological effects of such traumas vary in type and extent. More severe responses occur in the context of greater event severity; closer proximity to the epicenter of the event; physical injury; witnessing injury or death of others (especially family or loved ones); higher levels of peritraumatic terror, panic, horror, or helplessness; major property loss; and circumstances in which the survivor is unable to access social support and post-disaster resources.2,3 Certain survivor-related variables also can be contributory, including a history of previous trauma exposures, previous or current psychiatric disorder, female gender (probably based on the greater number of prior traumas already experienced by women by the time they encounter the event), older age, and lower socioeconomic status.1,2