The Climate Change is taking place confirmed the Intergovernmental Panel on Climate Change in his last report released in 2007. But, how does the Climate Change affect the steady rise of natural disasters?This paper tries to explain the coherency between the climatic changes of the last few years and the progress of natural hazards. The results of research show, that the apparent Climate Change leads to an increasing influence in the occurrence and intensity of natural disasters.Also in Austria a steady rise of incurred losses from natural hazards is denoted. Flood, avalanches, earthquake, storm and hail are going to become everyday occurrences. For insurances companies the losses arising from one event exceed the amount that is covered by insurances. Therefore most of the companies consider the possibility of increasing the assurance benefit. Furthermore, they have to find new ways according to the policy towards risk. For this purpose the re-insurance is playing a major role. In this context it is shown, how the insurance business handles with the risks concerning natural disasters. Over the past years, insurances note a marked increase of the loss ratio. They have to find new instruments to support the risk management. Risk rating based on geographical information is playing a central component in the risk management of insurance companies. Nowadays the use of tools like geographical underwriting is widespread through insurance provider. Using GIS-applications such as HORA, ALDIS or NATHAN the potential risks of natural hazards are presented. The last chapter of this paper handles with the practical use of geographical underwriting tools concerning natural hazards. After a short implementation in GIS, a closer look to the main features such as modelling and simulation is given. To establish understanding, the implementation of risk modelling of natural hazards is pointed out with a case study.