The frequency of intense natural disasters (defined here as events triggered by hazards of nature and causing at least 100 deaths or affecting the survival needs of at least 1,000 people) increased notably from the 1970s to the 2000s. Intense hydrometeorological disasters (related to floods and storms), and climatological disasters (related to droughts and heat waves) to a lesser extent, accounted for most of the worldwide increase in natural disasters.
Natural disasters are on the rise worldwide. There are more and more intense natural disasters—which are defined to cause at least 100 deaths or to affect the basic survival needs of at least 1,000 people—resulting from floods and storms as well as droughts and heat waves.
