Wildfire evidence study · California, United States · 2015
The Valley Fire is a useful case for a deceptively difficult question: how many homes were lost? The answer cannot be obtained by copying a headline count of structures. CAL FIRE’s archived narrative separates homes, multi-family buildings, commercial properties and minor structures. Those categories describe different units of loss.
Documentary review · Sources checked 30 October 2026 · Historical case, not live incident information.
The published event record
| Field | Recorded value |
|---|---|
| Start | 12 September 2015 |
| Later milestone | 15 October 2015 |
| Reported acres | 76,067 |
CAL FIRE records an electrical cause and an origin in southern Lake County. Its archived situation summary lists 1,958 destroyed structures: 1,280 homes, 27 multi-family structures, 66 commercial properties and 585 minor structures. It separately lists 93 damaged structures. The page links a final damage inspection report dated 11 January 2016. These are source-specific records, not a new Tecnobosque damage survey. See primary records below.
Why a structure count is not a housing count
A shed and a house each contribute one to a structure total, while a multi-family building may contain several dwellings. Neither building count nor dwelling count measures the number of displaced people. Consequently, writing “1,958 homes” would change the meaning of the source rather than simplify it.
A reproducible comparison should retain the four original categories, mark damaged and destroyed separately, and record the assessment date. For a housing-recovery question, the next evidence needed is a dwelling-unit inventory linked to permits and occupancy. For an infrastructure question, commercial and utility assets need their own categories.
The archived narrative also points to watershed response and rehabilitation. Rebuilding and landscape recovery therefore require separate evidence tracks. A count of completed houses would not show whether a slope had stabilized; a recovering vegetation index would not show whether households had returned.
What this study does and does not establish
This review reads the incident summary and its category definitions. It does not reconcile every later statewide damage total or claim that the linked final inspection report has been independently re-audited.
This is a documentary evidence review, not fieldwork or an independent forensic investigation. Published numbers retain their source definitions. Differences are identified rather than silently reconciled. The analysis above is Tecnobosque’s interpretation of the cited record.
Primary records and source notes
- Valley Fire: official incident or annual record — chronology, scope and reported figures discussed above.
Continue the investigation
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Cite this record
Tecnobosque. “Valley Fire 2015: Damage Categories and the Difference Between Homes and Structures.” Documentary evidence review, 30 October 2026. https://tecnobosque.com/valley-fire-2015/. Cite the underlying primary source when reusing its figures.