Interactive analysis of 27 years of NIOSH Fire Fighter Fatality Investigation reports (742 incidents, 1,110 victim records, 1998–2025), cross-linked with the USFA firefighter fatality registry (3,916 records, 1990–2025 by date of death). Victim records include roughly 70 seriously injured survivors from injury investigations and multi-casualty incidents.
Cohort rule: NIOSH investigates only ~25% of LODDs, selectively. NIOSH charts describe the investigated cohort (causal detail); USFA charts describe the population (counts and trends). Every card is labeled with its cohort.