Emergency of nature character
Natural disaster is a natural phenomenon causing an emergency situation that threatens life and health of people and leads to large material losses.
Many dangerous natural phenomena are closely connected.
For example, an earthquake can cause landslides, landslip, mudflow, flood, tsunami, avalanches, activation of volcanic activity. Many storms, hurricanes, tornadoes are accompanied by downpours, thunder and hail. Strong heat is accompanied by drought, lowering of groundwater, fires, epidemics, invasions of pests.Depending on the origin (nature) and mechanism of action, dangerous natural phenomena can be divided into 6 groups:
1. Geophysical hazards: earthquakes, volcanic eruptions.
2. Geological hazards (exogenous geological phenomena): soil slip, torrent, fall of ground, avalanches, ground subsidence.
3. Meteorological and agrometeorological hazards: hurricanes, storms, tornadoes, dust storm, squall, hailstorm, rainstorm, blizzard, glaze, frost, dense fog, drought, dry hot wind.
4. Marine hydrological hazards: typhoon, storm, heavy fluctuations in sea level, intensive ice drift.
5. Hydrological hazards: high water, low water, flood, early freezing on navigable water bodies and rivers, flooding (ground water rise).
6. Natural fires: forest fires, fires of steppe and grain massifs, peat fires, underground fires of fossil fuel.
Among the most dangerous natural disasters are earthquakes, landslides, mudflows, landslides, hurricanes, storms, tornadoes, floods, forest and peat fires.