NIOSH Firefighter Fatality Reports: 10 Recurring Lessons That Keep Showing Up

Nobody likes reading NIOSH reports. They are hard to get through, not because the language is complicated, but because every single one of them represents a firefighter who did not go home. A real person with a family, a crew, a life outside the station. But if we do not study these reports, we are choosing to ignore the lessons that were paid for with the highest possible price. That is not acceptable.

I have been reading NIOSH Firefighter Fatality Investigation and Prevention Program reports for most of my career. After working through hundreds of them, the same themes appear over and over again. Different departments, different years, different parts of the country, but the same contributing factors. These are not obscure edge cases. These are systemic problems that we keep allowing to exist.

The CDC maintains the full archive of these investigations through their NIOSH Fire Fighter Fatality Investigation and Prevention Program at cdc.gov/niosh/fire-fighter-fatality-investigation-and-prevention-program. Every firefighter, every officer, and every chief should be spending time on that website. The reports are free. They are detailed. And they exist specifically so that other firefighters do not die the same way.

Here are the 10 recurring lessons that keep showing up.

Lesson 1: Incident Command Was Not Established or Was Ineffective

This appears in the majority of LODD reports. Either nobody established command, command was established in name only with no real tracking of resources, or the incident commander was also functioning as a company officer and could not manage both roles. When command breaks down, accountability breaks down. When accountability breaks down, people get lost, resources get freelanced, and conditions change without anyone tracking them.

Establishing command is not just about grabbing a vest and announcing yourself on the radio. It means maintaining a mental model of the incident, tracking who is inside, monitoring conditions, and being willing to change the plan when the situation changes. If you cannot do that because you are pulling hose or forcing doors, then you are not commanding. You are just wearing the vest.

Lesson 2: Inadequate Size-Up Led to Bad Strategy

Fires that should have been fought defensively were attacked offensively. Buildings that were clearly compromised were entered without proper assessment. Conditions that indicated ventilation-limited fires were changed dramatically when crews opened up without coordinating with interior teams.

A proper size-up takes 60 to 90 seconds. You walk the scene, read the building, evaluate smoke and fire conditions, consider construction type, and make a decision about strategy. Skipping this step or rushing through it because "we always go interior" has killed firefighters. The building does not care about your traditions.

Lesson 3: Radio Communications Were Poor or Nonexistent

Crews entered without checking in. Mayday procedures were not understood or not followed. Critical information about changing conditions was never transmitted. Portable radios malfunctioned or were not carried by every member inside the structure.

Every firefighter operating inside a structure needs a portable radio that works. Every firefighter needs to know how to declare a mayday. Every officer needs to provide regular progress reports. Every incident commander needs to acknowledge and track those reports. This is basic stuff, and it keeps showing up as a contributing factor in LODDs because we get complacent about it.

Lesson 4: Crew Integrity Was Lost

Firefighters became separated from their partners inside the structure. In some cases, individual firefighters entered alone. In others, crews split up to cover more ground and lost contact with each other. When a firefighter becomes separated and gets disoriented, there is nobody to help them, nobody to report their location, and nobody to notice they are missing until it is too late.

Two in, two out is not a suggestion. Crew integrity is not optional. The buddy system exists because when things go wrong inside a burning building, your partner is your lifeline. Maintaining visual or voice contact with your crew is a non-negotiable standard.

Lesson 5: Situational Awareness Deteriorated

Crews became focused on their specific task and stopped paying attention to the overall conditions of the incident. Smoke conditions changed, floor systems weakened, fire extended to uninvolved areas, and the crews inside did not recognize the signs until it was too late.

Situational awareness is a skill that has to be actively practiced. It means keeping your head on a swivel, monitoring conditions constantly, communicating what you see, and being willing to back out when your gut tells you something is wrong. The fire does not announce when it is about to flash over. You have to read the signs.

Lesson 6: Rapid Intervention Was Delayed or Unavailable

When a mayday was declared, there was no RIT in place, or the RIT was not trained, equipped, or positioned to respond effectively. In several reports, the RIT took 10 or more minutes to locate and reach the downed firefighter. In structure fires, that delay is often fatal.

A RIT needs to be established early, needs to be fully equipped, needs to be positioned at the point of entry, and needs to have trained specifically for rescue operations in zero-visibility IDLH environments. Standing two firefighters near the front door and calling them a RIT is not enough.

Lesson 7: Pre-Incident Planning Was Absent

Crews operated in buildings they had never seen before. They did not know the layout, the construction type, the contents, or the hazards present. In commercial and industrial occupancies, this lack of pre-planning contributed directly to firefighter deaths.

Pre-incident planning is one of those things that every department knows they should do but most do not do consistently. Walking through target hazards, noting construction features, identifying access points, marking utility shutoffs, and documenting unusual contents takes time. But that time investment pays off when you are making decisions under pressure at 0200.

Lesson 8: Physical Fitness Was a Contributing Factor

Cardiac events remain the leading cause of firefighter line-of-duty deaths year after year. Many of these deaths occur during or immediately after physical exertion on the fireground. Firefighters operating at high intensity while wearing 60 to 75 pounds of gear in extreme heat are pushing their cardiovascular systems to the limit.

Departments that do not have mandatory fitness programs are accepting a level of risk that is preventable. Individual firefighters who do not maintain their cardiovascular health are putting themselves and their crews at risk. This is not about looking good. This is about your heart being able to handle the workload this job demands.

Lesson 9: SOPs Existed but Were Not Followed

Many of the departments involved in LODD incidents had standard operating procedures that addressed the exact issues that contributed to the death. The SOPs were on the shelf, but they were not in practice. They were written but not trained, not enforced, and not followed.

An SOP that nobody follows is worse than no SOP at all, because it creates a false sense of security. Leadership at every level is responsible for ensuring that SOPs are not just written documents but living practices. That means training on them regularly, enforcing them consistently, and updating them when they no longer serve the department.

Lesson 10: Lessons from Previous Incidents Were Not Applied

Perhaps the most frustrating finding in many NIOSH reports is a reference to a similar incident at the same department or in the same region that had already been investigated. The lessons were already available. The recommendations had already been made. And they were not implemented.

This is the cycle that kills firefighters. An incident happens. An investigation is conducted. Recommendations are made. Everyone acknowledges the findings. And then nothing changes. Until it happens again. Breaking this cycle requires leadership commitment, training investment, and a culture that values learning over tradition.

What You Can Do Right Now

Read the reports. Start with the most recent investigations and work backward. When you read one, discuss it with your crew during a training session. Talk about what went wrong, what could have been done differently, and whether your department is vulnerable to the same factors. Use the reports as case studies, not as distant tragedies that could never happen here.

Every department that lost a firefighter in these reports believed it could not happen to them. It can happen anywhere. The only defense is preparation, training, and a willingness to confront uncomfortable truths about our own readiness.

First Due Co. builds training tools around these exact lessons. Our size-up trainer, radio simulators, and scenario-based drills are designed to reinforce the decision-making skills that these reports tell us are critical. Train smarter at firstdueco.com.