ObjectivesMass Casualty Incidents (MCIs) are rare but devastating events that require extensive planning in order to minimize morbidity and mortality. There are two broad categories limiting a hospital's response: physical assets (e.g., critical care beds, operating rooms, food, communication devices) as well as operating procedures (e.g., MCI committees, regional coordination, provider training). The purpose of this study is to provide an examination of MCI preparedness according to these categories in Level 1 Trauma Centre across Canada. MethodsThis study surveyed all Level 1 Trauma Centres across Canada in order to assess the physical assets and operating procedures they had in place in the event of a hypothetical MCI on one of the busiest days of the year for trauma care. ResultsOf the 28 Trauma Centres contacted, 13 completed surveys (46%). Most hospitals had sufficient food (9/13) water (9/13), fuel (7/13), and communication assets (8/13) for a hypothetical MCI. A median of 38 mechanical ventilators could be mobilized. No hospitals mandated physician training for MCIs, and 6/13 centres were certain that they had a Strategic Emergency Management Plan (SEMP). Only 6/13 hospitals had dedicated MCI committees, Overall, 4/13 hospitals had explicit plans developed with community hospitals. ConclusionThis study demonstrated that physical assets are generally less limiting than operating procedures. Four key areas of potential improvement have been identified: 1) provider training (especially physicians), 2) coordination with small hospitals, 3) mechanical ventilator availability, and 4) MCI committees with explicit Strategic Emergency Management Plans.