India launches SACHET system for real-time disaster alerts nationwide
- SACHET rolled out nationwide on May 2 as India’s integrated disaster alert system
- System enables geo-targeted warnings using cell broadcast and multiple channels
- Developed by C-DOT for NDMA with inputs from weather and disaster agencies
- Alerts can reach millions of devices within seconds without internet
- Mobile app provides forecasts, safety guides, and location-based alerts
India has rolled out its Integrated Alert System, known as SACHET, to deliver real-time disaster warnings across the country, marking a shift in how emergency information is communicated to citizens. The system was formally activated nationwide on May 2, coinciding with a large-scale test of cell broadcast alerts.
SACHET, developed by the Centre for Development of Telematics for the National Disaster Management Authority, is designed to function as a centralized platform that gathers inputs from multiple agencies and disseminates alerts across several communication channels simultaneously.
Unlike earlier systems that relied primarily on SMS, SACHET integrates cell broadcast technology, allowing messages to be delivered instantly to all mobile devices within a specific geographic area. Officials say this method reduces delays caused by network congestion and ensures that warnings reach users even without internet connectivity.
The system also supports multi-channel communication. Alerts can be transmitted through mobile networks, television, radio broadcasts, and public announcement systems such as those used in railway stations. This layered approach is intended to increase redundancy and ensure wider reach during emergencies.
One of the core features of SACHET is its geo-targeting capability. Using Geographic Information System data, authorities can issue alerts to precise locations, ranging from a single district to an entire state. This allows warnings to be confined to affected areas, minimizing unnecessary disruption elsewhere.
The platform operates on a Common Alerting Protocol framework, which standardizes the flow of information from agencies such as the India Meteorological Department, the Central Water Commission, and the Indian National Centre for Ocean Information Services. These inputs are processed and converted into public alerts through a unified gateway.
Alongside the broadcast system, authorities have introduced a SACHET mobile application that offers additional features. The app provides location-based weather updates and disaster warnings, allows users to subscribe to alerts for multiple regions, and includes a repository of safety guidelines for different emergency scenarios.
The application also supports multiple Indian languages and includes accessibility features such as audio read-outs, enabling broader usability across diverse user groups.
The integration of cell broadcast technology into SACHET is considered a significant upgrade. Officials indicate that alerts can now be transmitted to millions of users within seconds, improving response time in critical situations such as earthquakes, floods, and severe weather events.
Users can access live alert information through the official web portal, which displays active warnings across different regions of the country. The mobile application is available through standard app distribution platforms.
Authorities describe SACHET as part of a broader effort to strengthen disaster preparedness and reduce response gaps, though its effectiveness will depend on continued testing, coordination between agencies, and public awareness of how to respond to alerts.