Short answer. Australia warns the public through Emergency Alert, which sends text messages to mobiles and voice messages to landlines from +61 444 444 444, and is moving to AusAlert, a cell-broadcast system that needs no registration or app 123. Warnings follow three levels: Advice, Watch and Act, and Emergency Warning 1. There is no national outdoor siren network.
What is Emergency Alert?
Emergency Alert is the national telephone warning system. It sends voice messages to landlines and text messages to mobile phones within a defined area 12. Messages come from +61 444 444 444, and the official advice is direct: "DO NOT BLOCK +61 444 444 444." 12
What is AusAlert and when does it start?
AusAlert sends alerts by cell broadcast to compatible devices in a defined area. It needs no registration, app or phone number, works without an active SIM, and does not collect your phone number or location 13. ACT ESA explains: "An AusAlert is not a text message. It appears as an alert on your device and may make a distinctive siren-like sound and vibrate depending on the type of alert." 1
A July 2026 AusAlert notice said the system was scheduled to become operational nationally in October 2026, after a national test on 27 July 2026 3. ACT ESA already describes AusAlert as Australia's national emergency warning system, with Emergency Alert continuing during the transition 1. The exact start date could not be confirmed on an official page.
What do the three warning levels mean?
| Level | Meaning |
|---|---|
| Advice (yellow) | An incident has started. There is no immediate danger. Stay up to date in case the situation changes 1. |
| Watch and Act (orange) | Heightened threat. Conditions are changing; start taking action now to protect you and your family 1. |
| Emergency Warning (red) | Highest level. You may be in danger and need to act immediately. Any delay now puts your life at risk 1. |
Are there sirens in Australia?
Not as an outdoor network. No national network of outdoor sirens was found in official sources. The Standard Emergency Warning Signal (SEWS) is a distinct siren sound that radio and TV broadcasters may play before an Emergency Warning 1. If you hear it, listen to the message that follows.
Which apps and radio stations should I use?
| Channel | Where | Source |
|---|---|---|
| Hazards Near Me app | ACT (recommended by ACT ESA) | 1 |
| VicEmergency app | Victoria | 4 |
| ABC Local Radio | Emergency broadcaster to keep tuned to, e.g. 666 AM in Canberra | 1 |
A battery-operated radio is on the official kit lists (see our Australia kit checklist). Our guide Which radio and alerts do you need when networks are down? explains why a radio matters when phone networks fail.
Frequently asked questions
Do I need to sign up for emergency alerts in Australia?
No. Emergency Alert is sent to phones in the affected area, and AusAlert needs no registration, app or phone number 123.
Is an AusAlert a text message?
No. It appears as an alert on your device and may make a siren-like sound and vibrate, depending on the alert type 1.
What number do Emergency Alert messages come from?
+61 444 444 444. Do not block it 12.
What should I do at an Emergency Warning?
Act immediately: it is the highest level, and any delay puts your life at risk 1.
Sources
- ACT Emergency Services Agency — Warnings & Alerts — https://www.esa.act.gov.au/aws (accessed 2026-10-20)
- Emergency Alert (Australian state and territory governments) — Emergency Alert — https://www.emergencyalert.gov.au/ (accessed 2026-10-20)
- AusAlert (notice republished by the Wireless Institute of Australia) — National AusAlert Test Set for Monday 27 July — https://www.wia.org.au/newsevents/news/2026/20260721-1/index.php (accessed 2026-10-20)
- Country Fire Authority (Victoria) — Sheltering in a fire bunker — https://www.cfa.vic.gov.au/fire-safety/your-fire-plan/last-resort-options/sheltering-in-a-fire-bunker (accessed 2026-10-20)
Turn this into action
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Sources
- ACT Emergency Services Agency · Warnings & Alerts checked 2026-10-20
- Emergency Alert (Australian state and territory governments) · Emergency Alert checked 2026-10-20
- AusAlert (notice republished by the Wireless Institute of Australia) · National AusAlert Test Set for Monday 27 July checked 2026-10-20
- Country Fire Authority (Victoria) · Sheltering in a fire bunker checked 2026-10-20