Humans face natural hazards on different scales in time and space. Geological, hydrometeorological and geophysical hazards affect human life and health as well as having a dramatic impact on sustainable development of society. They are a pending danger for vulnerable lifelines and infrastructure such as water supply and reservoirs, pipelines, and power plants. Developed countries are affected, but the impact is disproportionate within the developing world. Extreme natural events can change the life and economic development of developing nations within minutes and throw them back for decades.