Over the past few decades, and the world as a whole has been experiencing damage from floods, partly due to rising temperatures. Flooding not only damages houses and structures, but also deteriorates the sanitary environment and makes epidemics more likely to occur. Estimates show that the number of people affected by river flooding totaled approximately 65 million worldwide in 2010, but now more than 100 million. It is estimated that the number will increase to 132 million by 2030. It is said that the economic loss caused by the disruption of people's activities by flooding exceeds $500 billion worldwide.