Fires and explosions destroy the evidence of their own cause as they release it. We reconstruct origin, cause, and sequence from what survives — and to a standard that holds up under cross-examination.
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Fire and explosion investigations start from a paradox: the event that needs explaining is also the process erasing the evidence that would explain it. A structure fire consumes the material at its own point of origin; a dust deflagration disperses the very cloud that fueled it before the flame front reaches the far wall; a vapor cloud explosion can level the piping that leaked in the first place. What survives — char patterns, arc beads, vent-panel deformation, fault-recorder timestamps, fuel and weather data — has to be read against an established methodology, not intuition, because the conclusions in this department routinely decide who pays for a total loss, a criminal charge, or a mass-casualty verdict. This department covers the mechanisms where fuel, oxidizer, and ignition intersect, from a smoldering electrical connection to a vapor cloud that levels a city block.
Each specialization area covers a distinct ignition or explosion mechanism with its own physics, examination protocol, and governing standards. Start with the one that matches your incident.
Combustible dust deflagrations — primary and secondary explosions, ignition sources, and explosibility testing.
investigateFires ignited by arcing, glowing connections, and overloaded wiring — origin, cause, and arc mapping.
investigateNatural gas and LP-gas explosions — leak source, migration path, ignition, and blast reconstruction.
investigateOrigin-and-cause investigation of building fires — fire dynamics, pattern analysis, and incendiary determination.
investigateAutomotive fire origin and cause — engine bay, wiring, fuel systems, and EV battery thermal runaway.
investigateWildland fire origin and cause — utility ignition, equipment, lightning, and fire spread reconstruction.
investigateFire and explosion investigations follow a documented, repeatable methodology — not because a standard requires it, but because skipping a step is how a conclusion gets overturned later.
Technical briefings and case analyses on fire and explosion origin, cause, and reconstruction — written by the people who investigate them.
Lightning ignitions can smoulder for days before they are detected, which puts the strike and the fire on different dates and makes the distinction from human causes less obvious than it sounds.
readWhere a wildfire is attributed to electrical infrastructure, the conductors, the hardware and the operator's own recorded data usually contain the answer.
readA fire that burns a landscape still started at one point. Origin area determination in wildland fire runs backward along the fire's own directional record.
readMost non-collision vehicle fires trace to one of two mechanisms. Distinguishing them is usually possible, and it determines whether the answer is maintenance, repair work or a manufacturing defect.
readHigh-voltage battery fires reignite hours or days after suppression. That behaviour is a safety problem, a storage problem and an evidence-preservation problem at the same time.
readSequencing a vehicle fire against a collision changes who is responsible for what. The physical evidence and the recorded data usually constrain the order more tightly than either does alone.
readNFPA 921, the Guide for Fire and Explosion Investigations, sets out a scientific-method approach: recognize the problem, collect data, form hypotheses, and test each one against the physical evidence rather than reaching a conclusion by ruling out alternatives you never actually tested. Courts routinely evaluate fire-cause opinions against it, and a conclusion that departs from its methodology without a stated reason is one of the first things opposing experts and cross-examination will target.
Both start with the same NFPA 921 origin-and-cause discipline, but an explosion investigation layers on a second body of physics — deflagration versus detonation, overpressure, venting, and confinement — that a pure fire investigation does not need. Many real incidents are both: an explosion event followed by a fire that consumes the scene, which means the explosion mechanics have to be reconstructed first, before the fire damage can be correctly interpreted on top of it.
Faster than most people expect. Demolition crews, insurance-mandated mitigation, weather exposure, and even well-intentioned cleanup can destroy origin-area evidence within days, and salvage or suppression activity at a wildfire or industrial site can erase burn indicators within hours. The earlier an investigator is involved — ideally before anything is moved — the stronger the eventual opinion, because origin determination depends on the spatial relationship between damage patterns that a single photograph rarely captures completely.
Sometimes, but with real limits. Photographs taken during cleanup, witness statements, retained debris samples, equipment pulled before disposal, and electronic records — SCADA, BMS, alarm panel, or event-recorder data — can still support a conclusion. What is usually lost is the ability to test alternate hypotheses directly against the physical scene, which weakens confidence and invites challenge. If the scene has already been disturbed, the priority becomes preserving whatever remains immediately rather than waiting.
Describe the incident. We will scope it and connect you with the right expert — usually within one business day.