An early warning system refers to a predictive system that is designed to alert people of a potential danger or a threat soon enough for them to take appropriate action. Other terms that can be used instead of "early warning system" include "alarm system," "alert system," "warning system," "surveillance system," and "prediction system." Early warning systems can be found in various settings, including weather forecasting, military operations, financial markets, and public health. Such systems play a vital role in risk reduction and prevention. With the use of early warning systems, individuals and organizations can prepare for potential dangers and prevent significant losses and damages.