disaster life_threatening ai_generated true

AI advises sheltering in a dry ditch or gully during a wildfire (radiant heat and fire whirl risk)

ID: disaster/wildfire-dry-ditch-myth

Also available as: JSON · Markdown · 中文
80%Fix Rate
88%Confidence
1Evidence
2023-08-20First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
NFPA Wildland Fire Safety 2023 active — — —
CalFire Evacuation Guidelines v4.2 active — — —

Root Cause

Dry ditches and gullies concentrate radiant heat, funnel flames, and can generate fire whirls; they also trap smoke, leading to asphyxiation, and offer no protection from ember showers.

generic

中文

干沟和冲沟会集中辐射热，引导火焰，并可能产生火旋；它们还会滞留烟雾，导致窒息，且无法防护余烬雨。

Official Documentation

https://www.ready.gov/wildfires

Workarounds

  1. 65% success If trapped, find a large, non-vegetated area (e.g., a parking lot or bare rock face) and lie face-down, covering your body with a wool blanket or jacket. Call 911 and provide GPS coordinates. 
    If trapped, find a large, non-vegetated area (e.g., a parking lot or bare rock face) and lie face-down, covering your body with a wool blanket or jacket. Call 911 and provide GPS coordinates.
  2. 95% success Pre-evacuate when a wildfire warning is issued. Use the 'Watch Duty' app for real-time fire perimeter updates. Do not wait for a direct order. 
    Pre-evacuate when a wildfire warning is issued. Use the 'Watch Duty' app for real-time fire perimeter updates. Do not wait for a direct order.

中文步骤

  1. If trapped, find a large, non-vegetated area (e.g., a parking lot or bare rock face) and lie face-down, covering your body with a wool blanket or jacket. Call 911 and provide GPS coordinates.
  2. Pre-evacuate when a wildfire warning is issued. Use the 'Watch Duty' app for real-time fire perimeter updates. Do not wait for a direct order.

Dead Ends

Common approaches that don't work:

  1. 70% fail

    Assuming that being below ground level shields from heat; radiant heat can still be lethal from nearby flames.

  2. 55% fail

    Believing that dry vegetation in a ditch won't burn; embers can ignite it instantly.