 IPAWS OPEN is a set of securely hosted Web services that enable the routing of standards-compliant emergency messages between disparate third-party applications, systems, networks and devices.As stated by FEMA, reasons for terminating DEAS included concerns over the stability and reliability of some of the underlying products, and the proprietary nature of many of the systems used within DEAS.However, responding to a mandate included in the WARN act, FEMA continues to utilize a variant of the DEAS architecture for Wireless Emergency Alerts, also known as the Personal Localized Alerting Network (PLAN).