This Week in Fire History: 1923 The Berkeley Fire became an early warning for modern WUI risk
Fireline Report · This Week in Fire History
1923 — The Berkeley Fire became an early warning for modern WUI risk
Berkeley, California · Anniversary: 2026-09-17
The event
Driven out of Wildcat Canyon by hot Diablo winds, the Berkeley Fire swept into developed neighborhoods north of the University of California campus. It destroyed 584 structures, burned 34 city blocks, and left about 4,000 people homeless.
Why it still matters
The event linked wind-driven ember spread, combustible roofs, limited water supply, and constrained evacuation in a pattern that remains recognizable in modern WUI disasters.
What the record shows
- fire behavior: Hot, windy conditions carried burning leaves, grass, shingles, and other firebrands downhill from the Berkeley Hills into developed neighborhoods.
- date: The Berkeley Fire occurred on September 17, 1923.
- lesson: Wood shake roofs were identified as a major contributor to structural fire spread.
- impact: The fire destroyed 584 structures and 34 city blocks; municipal planning records estimate about 4,000 people were left homeless.
- operations: The main fire stopped after the wind shifted; historical accounts also describe structure demolition and backfiring used to defend threatened areas.
Sources
- 2024 Local Hazard Mitigation Plan — Risk Assessment — City of Berkeley
- Berkeley Fire of September 17, 1923 — City of Berkeley
Historical details are drawn from the cited sources. Image rights and attribution are recorded in the Fireline Report media catalog.
