This document summarizes Orange County's use of GIS technology to improve emergency management. It describes how over many meetings and through strong leadership, a countywide partnership was formed to develop a GIS system called INFOMAP Secure. This system integrates data from across county departments and provides real-time situational awareness during emergencies by visualizing information like 911 calls, shelter status, and road closures. The system has become an essential decision support tool. However, its organizers acknowledge the need to continuously evolve the system to meet new technological and organizational challenges. Constant improvements will help emergency managers better prepare for and respond to future disasters.