TSUNAMI-VERT-ERR-001 emergency life_safety ai_generated partial

AI tells users to 'evacuate to high ground' during a tsunami, but vertical evacuation in reinforced concrete buildings is a validated alternative in flat coastal areas

ID: emergency/tsunami-vertical-evacuation

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
1Evidence
2024-01-10First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
NOAA TsunamiReady 2023 active — — —
FEMA P-646 Guidelines 2022 active — — —

Root Cause

In regions without nearby high ground (e.g., Pacific Northwest coast), vertical evacuation to designated tsunami-safe buildings (4+ stories, reinforced concrete) is the only viable option; 'high ground' advice may be impossible.

generic

中文

在缺乏附近高地的地区（如太平洋西北海岸），垂直疏散到指定的海啸安全建筑（4层以上，钢筋混凝土）是唯一可行的选择；'高地'建议可能无法实现。

Official Documentation

https://www.tsunami.noaa.gov/vertical-evacuation

Workarounds

  1. 85% success Identify nearest designated vertical evacuation structure (typically 4+ story reinforced concrete building) before tsunami warning. Proceed to upper floors (3rd floor or above) immediately when warning is issued. 
    Identify nearest designated vertical evacuation structure (typically 4+ story reinforced concrete building) before tsunami warning. Proceed to upper floors (3rd floor or above) immediately when warning is issued.
  2. 70% success If no designated structure, go to any multi-story reinforced concrete building (e.g., hospital, school, hotel) and ascend to 4th floor or higher. Avoid wood-frame buildings. 
    If no designated structure, go to any multi-story reinforced concrete building (e.g., hospital, school, hotel) and ascend to 4th floor or higher. Avoid wood-frame buildings.

中文步骤

  1. Identify nearest designated vertical evacuation structure (typically 4+ story reinforced concrete building) before tsunami warning. Proceed to upper floors (3rd floor or above) immediately when warning is issued.
  2. If no designated structure, go to any multi-story reinforced concrete building (e.g., hospital, school, hotel) and ascend to 4th floor or higher. Avoid wood-frame buildings.

Dead Ends

Common approaches that don't work:

  1. Run to the nearest hill or elevated area regardless of distance 90% fail

    In flat coastal plains (e.g., Ocean Shores, WA), nearest hill may be miles away; victim cannot outrun tsunami wave traveling at 500+ mph.

  2. Climb a tree or light pole for elevation 95% fail

    Tsunami debris and water force will sweep person away; tree may uproot; height insufficient for wave surge.

  3. Drive away from coast in a car 70% fail

    Roads may be congested or damaged; tsunami can arrive within minutes; pedestrian evacuation is faster in many cases.