The hidden biological heat that turns stored hay into a fire hazard
In short: Hay bales can spontaneously ignite even without an external spark. This video explains the specific combination of moisture, density, and biology required to turn agricultural storage into a dangerous chemical reaction.
Spontaneous combustion in hay occurs when internal temperatures rise enough to reach an ignition point. While most dry bales remain stable, tight packing creates an environment where heat cannot escape easily.
The process is driven by the interaction between plant reactions and bacterial growth. These biological processes generate heat within even the driest materials; however, it typically requires a specific threshold of moisture and density to trigger a fire.
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Sources
- Summary by Intellect · source: Why Does Moist Baled and Stacked Hay Spontaneously Catch Fire?
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