We are hearing ever more frequent mention of ‘Megafires’. The word is an emerging concept commonly used to describe fires that are extreme in terms of size, behaviour, and/or impacts.
In describing ‘Megafires’, it is clear that fire size thresholds vary round the world from > 100 to more 100,000 ha. In Australia, a mega fire year is defined as the cumulative burned area of forest over one year of more than 1 million hectares. Fires greater than 100,000 hectares have also been increasing – check this list for details.

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