Fusi Early Warning System is a series of systems (consist of devices and applications) to notify the occurrence of natural events, which can be in the form of disasters or other natural signs. Early warning to the public on disasters is an act of providing information in language that is easily digested by the community.

In critical situations, in general, early warning which is the delivery of information is manifested in the form of sirens, gongs and so on. However, hiding sirens is only part of the form of conveying information that needs to be done because there is no other faster way to deliver information to the public. The hope is that the public can respond to the information quickly and accurately. The alertness and speed of the public's reaction is needed because of the limited time from when the information is issued to the time (allegedly) the disaster will occur. Critical conditions, limited time, major disasters and saving residents are factors that require early warning. The earlier the information is submitted, the less time for the population to respond.

The release of information about hazard conditions is the estuary of a process flow for analyzing raw data about disaster sources and synthesizing various considerations. Information accuracy can only be achieved if the quality of analysis and synthesis that leads to the release of information has high accuracy. Thus, in this case there are two main parts in early warning, namely the upstream part in the form of efforts to package data into accurate information and downstream in the form of efforts to quickly reach the community.