Blizzards
Atmospheric
Thunderstorms
Atmospheric
Lightning
Atmospheric
Tornadoes
Atmospheric
Tropical Cyclone
Atmospheric
Drought
Atmospheric
Hail Storm
Atmospheric
Frost, Heat Wave or Loo. Cold Waves etc.
Atmospheric
Earthquakes
Terrestrial
Volcanic Eruptions
Terrestrial
Landslides
Terrestrial
Avalanches
Terrestrial
Subsidence
Terrestrial
Soil Erosion
Terrestrial
Flood
Aquatic
Tidal Waves
Aquatic
Ocean Currents
Aquatic
Storm Surge
Aquatic
Tsunami
Aquatic
Plants and animals as colonizers (Locust etc).
Biological
Insects infestation fungal bacterial and viral diseases such as bird flu, dengue etc.
Biological