The two (2) types of disasters are:
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1) "natural disasters" (e.g. earthquakes, volcanoes, storms, fire (from natural causes—such as lightning and thunderstorms, forest fires not caused from humans), floods from rain, tornadoes, hurricanes, tsunamis, and any of the above that are secondary to to another one of the above), avalanches, drought—especially severe drought.
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2) "human-related disasters" (a.k.a "anthropogenic disasters"); such as:
"fire due to arson", mass shootings, acts of violence and warfare/ other acts of terrorism; spread of diseases.
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Source:
"Types of Disasters". SAMHSA—Substance Abuse and Mental Health Services Administration — U.S. Government. 24 Sept 2015. Web. Date view/accessed : 10 July 2018.
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