Australia doesn't have one emergency warning system. It has several, built at different times, by different agencies, for different purposes. This guide maps all of them and explains how they fit together.

AusAlert is Australia's new cell broadcast warning system. It sends alerts directly to every compatible phone in a targeted area. Critical alerts cannot be disabled and override silent mode. Managed by NEMA.

It replaces the Emergency Alert system (2009), which used SMS and had significant capacity and delivery problems.

AusAlert does not provide developer access or data feeds. For the technical details, see AusAlert and CAP-AU Architecture.

Each state runs its own emergency information app. If you travel between states, you need different apps. Each has different data, different update frequencies, and different formats.

This fragmentation is the core problem. A developer building a national emergency app needs to integrate with 8 different systems, each with different APIs, formats, and update patterns.

The Australian Warning System is not a technology. It is a nationally consistent visual and verbal framework for communicating emergency warnings. It defines three levels:

These levels appear in state apps, on government websites, and in AusAlert cell broadcast messages. EmergencyAPI maps all incident data to these levels via the warningLevel field.

SEWS is the distinctive siren tone played on TV and radio before major emergency broadcasts. It has been in use since 1992. You have probably heard it during bushfire season or severe weather events.

SEWS is a broadcast-only system with no data feed or API. It serves as an additional attention-getting mechanism alongside digital alerts.

None of the systems above provide a unified developer API. AusAlert is push-only. State apps have their own feeds in different formats. AWS is a visual framework. SEWS is audio.

EmergencyAPI is the data layer that sits underneath all of this. It aggregates 33 government feeds from all 8 states into one REST API with consistent formatting. Whether an incident comes from the CFS in SA, the RFS in NSW, or the CFA in VIC, the data arrives in the same GeoJSON structure with the same field names.

The Warning Ecosystem:

  AusAlert (push)     State Apps (visual)     SEWS (audio)
       |                    |                      |
       v                    v                      v
  [ Phones ]          [ Screens ]            [ TV/Radio ]
                            |
                            v
                   Government Data Feeds
                   (33 feeds, 8 states)
                            |
                            v
                      EmergencyAPI
                    (unified REST API)
                            |
                            v
                   Your Application