Natural threat

A natural threat is a threat stemming from natural causes.

Taxonomy
An agreed, common classification of natural threats does not exist. The methodical classification of all threats, drafted in the EU project VITA, probably comes closest. A simplified version of the natural threats in this classification is:


 * Earth
 * Shock (earthquake, volcanic energy release)
 * Fast movement (Landslide)
 * Slow movement (setting, erosion)
 * Melting (volcano)
 * Water
 * Precipitation(rain, snow, hail)
 * Suspended in air (fog, clouds)
 * High water (deluge, floods, rising ground water)
 * Drought
 * Solid (black ice, piling of snow, avalanche, freeze-up)
 * Air
 * Movement (wind)
 * Material transport (e.g. sandstorm, tornado)
 * Space
 * Meteorites
 * Electromagnetic
 * Lightning
 * Solar storm·
 * Fire
 * Due to flammable materials (forest, heath)
 * Due to geothermal activity (volcano)
 * Biological
 * Viruses (human, animal or plant disease)
 * Bacteria (human, animal or plant disease)
 * Fungi (human, animal or plant disease)
 * Growing vegetation
 * Animals (plague)

Whereas the examples given between brackets are not exhaustive, the classification itself should be.