Early warning systems (EWS) are critical frameworks designed to detect potential hazards and disseminate timely information to help communities prepare and respond effectively to emergencies. From natural disasters like hurricanes and earthquakes to public health threats such as epidemics, EWS play a vital role in minimizing impacts and safeguarding lives. This tag page delves into the latest research trends, technological innovations, and case studies highlighting the effectiveness of early warning systems across various contexts.