Recently, a vegetable field in Sichuan Province experienced an unusual underground spontaneous combustion event, with flames burning continuously for eight days—even rain failed to extinguish the fire, drawing widespread public attention. Local residents reported that thick smoke and a pungent odor first emerged from the ground, followed by visible flames shooting out from soil cracks at extremely high temperatures. Firefighters responded promptly, and preliminary investigations suggest that accumulated organic matter—such as crop residues and decaying vegetation—underwent anaerobic decomposition under hot, humid conditions, producing flammable gases like methane. When exposed to heat or an ignition source, these gases triggered underground combustion. Because the fire originated below the surface, conventional firefighting methods proved ineffective. The widespread distribution of combustible material further prolonged the blaze. Rain only cooled the surface without reaching the deep-seated fire source, thus failing to put it out. Experts warn that rural communities should properly manage agricultural waste and avoid piling large amounts in low-lying or enclosed areas to prevent similar incidents. Authorities have since implemented measures such as water injection and digging firebreaks to contain the situation, and the fire is now gradually subsiding. Although rare, such underground spontaneous combustion can occur under specific climatic and geological conditions and warrants serious attention.
近日，四川一处菜地突发地下自燃现象，火势持续燃烧长达8天，即便遭遇降雨也未能熄灭，引发广泛关注。据当地居民反映，起初地面冒出浓烟并伴有刺鼻气味，随后出现明火，火焰从土壤缝隙中窜出，温度极高。消防部门迅速介入调查，初步判断为地下堆积的有机物（如秸秆、腐烂植物等）在高温高湿环境下发生厌氧发酵，产生可燃气体（如甲烷），遇明火或高温后引发自燃。由于火源位于地下，常规灭火手段难以奏效，加之可燃物分布广泛，导致火势持续多日。即使下雨，雨水仅能冷却地表，无法渗透至深层火源，因此未能有效扑灭。专家提醒，农村地区应规范处理农业废弃物，避免大量堆积于低洼或密闭区域，以防类似事件再次发生。目前，相关部门已采取注水降温、开挖隔离带等方式控制火情，火势已逐步减弱。此类地下自燃现象虽不常见，但在特定气候与地质条件下仍可能发生，需引起重视。
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