disaster life_threatening ai_generated true

AI advises staying inside a car with windows up and AC recirculation on during a wildfire to filter smoke (toxic gas and radiant heat risk)

ID: disaster/wildfire-car-ac-myth

Also available as: JSON · Markdown · 中文
72%Fix Rate
89%Confidence
1Evidence
2024-06-10First Seen

Root Cause

Car AC recirculation cannot filter toxic gases like carbon monoxide and hydrogen cyanide from wildfire smoke, and the vehicle's metal body conducts radiant heat, causing interior temperatures to rise to lethal levels within minutes.

generic

中文

汽车空调内循环无法过滤野火烟雾中的一氧化碳和氰化氢等有毒气体，且车辆金属车身传导辐射热，导致车内温度在几分钟内升至致命水平。

Official Documentation

https://www.ready.gov/wildfires

Workarounds

  1. 70% success Evacuate the area before the fire arrives. If trapped, park in an area clear of vegetation (e.g., parking lot), close all windows, turn off engine, lie on the floor, and cover with a wool blanket. Call 911. 
    Evacuate the area before the fire arrives. If trapped, park in an area clear of vegetation (e.g., parking lot), close all windows, turn off engine, lie on the floor, and cover with a wool blanket. Call 911.
  2. 65% success If possible, abandon the car and move to a previously burned area or a body of water. Never stay in a car surrounded by flames. 
    If possible, abandon the car and move to a previously burned area or a body of water. Never stay in a car surrounded by flames.

中文步骤

  1. Evacuate the area before the fire arrives. If trapped, park in an area clear of vegetation (e.g., parking lot), close all windows, turn off engine, lie on the floor, and cover with a wool blanket. Call 911.
  2. If possible, abandon the car and move to a previously burned area or a body of water. Never stay in a car surrounded by flames.

Dead Ends

Common approaches that don't work:

  1. Turning on AC recirculation mode and covering vents with wet towels to filter smoke 80% fail

    Wet towels block airflow but do not filter CO; the car quickly fills with toxic gas and heat.

  2. Staying in the car with windows up and engine off to avoid drawing in smoke 90% fail

    Radiant heat from the fire will still heat the car interior to over 150°F, causing heatstroke.

  3. Driving through the fire front at high speed to escape 75% fail

    Fire fronts move faster than cars in many cases; the car may stall or catch fire from embers.