eli5 What does it mean when a fire is X% contained? And how is it measured?
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It means the firefighting team has created a discrete barrier around X% of the fire’s perimeter. So sometimes a fire will stop having active flames (extinguished), but if there’s still flammable material surrounding the burned area, the perimeter hasn’t yet been fully contained. On the other hand, there could be active flames kept within a well-defined clear border, and it would be 100% contained.
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