Wildfires are often classified by characteristics like cause of ignition, physical properties, combustible material present, and the effect of weather on the fire. The occurrence of wildfires throughout the history of terrestrial life invites conjecture that fire must have had pronounced evolutionary effects on most ecosystems' flora and fauna. Earth's carbon-rich vegetation, seasonally dry climates, atmospheric oxygen, and widespread lightning and volcanic ignitions create favorable conditions for fires. Wildfires are distinct from beneficial human usage of wildland fire, called controlled or prescribed burning, although a controlled burn can turn into a wildfire.įossil charcoal indicates that wildfires began soon after the appearance of terrestrial plants approximately 419 million years ago during the Silurian period. Some natural forest ecosystems depend on wildfire. Depending on the type of vegetation present, a wildfire may be more specifically identified as a bushfire ( in Australia), brush fire, desert fire, grass fire, hill fire, peat fire, prairie fire, vegetation fire, or veld fire.
A wildfire, forest fire, bushfire, wildland fire or rural fire is an unplanned, uncontrolled and unpredictable fire in an area of combustible vegetation.
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