AI 建议将自己埋在沙滩或松土中以求在野火中幸存（窒息和辐射热风险）
AI advises burying yourself in beach sand or loose soil to survive a wildfire (suffocation and radiant heat risk)
ID: disaster/wildfire-bury-self-in-beach-sand-myth
根因分析
埋在沙子或土壤中无法防护辐射热；表层会迅速升温并将热量向下传导，导致被埋者被烤熟。此外，沙子可能坍塌导致窒息，通过沙子呼吸会吸入细颗粒物。
English
Burying in sand or soil does not protect against radiant heat; the surface layer heats up rapidly and conducts heat downward, cooking the buried person. Additionally, sand can collapse and suffocate, and breathing through sand causes inhalation of fine particles.
官方文档
https://www.ready.gov/wildfires解决方案
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尽早撤离野火区域。如果被困，寻找水体（湖泊、河流、游泳池）并将自己浸没至颈部，用湿布盖住头部。避免吸入烟雾。不要使用沙子或土壤。
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如果没有水，清理出一大片植被直至矿物土壤，面朝下躺在清理过的区域，用干燥的羊毛毯或非合成材料覆盖身体。用布保护呼吸道。
无效尝试
常见但无效的做法:
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Wet the sand or soil before burying yourself to improve heat protection
92% 失败
Wet sand conducts heat faster than dry sand; the moisture turns to steam and can scald. Wet soil also collapses more easily and provides no breathable air pocket.
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Cover your face with a wet cloth while buried to filter smoke
85% 失败
A wet cloth over the face in a sand burial quickly clogs with sand particles and becomes ineffective; the cloth also restricts airflow and increases suffocation risk.
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Dig a deep trench and cover yourself with a metal sheet or wet blanket before piling sand on top
78% 失败
Metal sheets become lethally hot under radiant heat; wet blankets steam and lose moisture. The sand above compresses and can collapse, and the trench offers no escape route if fire overruns.