UK Emergency Alerts: What to Do When You Get One
What a UK Emergency Alert sounds like, which phones get them, what to do when one arrives, and why a radio is still essential.
Emergency Alerts are the UK Government’s way of warning people on their phones when there’s a danger to life nearby, such as severe flooding, fires or explosions. They are sent to every compatible phone in the affected area.
Based on official GOV.UK Be Ready guidance.
What happens when an alert arrives
- Your phone may make a loud, siren-like sound, even if it’s on silent, and vibrate or read the alert aloud.
- The sound and vibration last about 10 seconds.
- The alert includes a phone number or a GOV.UK link for more information.
What to do
- Stop what you’re doing and follow the instructions in the alert.
- If you’re driving or riding, don’t read or respond to it. Find somewhere safe and legal to stop first.
- Check on anyone nearby who may not have seen it, such as older neighbours without a smartphone.
- Turn on a battery or wind-up radio for updates, in case the mobile network goes down.
Which phones get alerts
Alerts work on 4G and 5G networks across the UK, on iPhones running iOS 14.5 or later and Android phones and tablets running Android 11 or later. They’re free, and you don’t need to sign up, download an app or have mobile data.
You won’t get alerts if your phone is off, only connected to 2G or 3G, on wifi only, or possibly in airplane mode. GOV.UK says no data about you, your device or your location is collected.
You can switch alerts off in your phone’s settings, but GOV.UK advises keeping them on because they contain life-saving information.
Frequently asked questions
What does a UK Emergency Alert sound like?
A loud, siren-like sound with vibration, lasting about 10 seconds, even if your phone is on silent.
Do I need to sign up for Emergency Alerts?
No. They’re free and sent automatically to compatible phones on 4G or 5G in the affected area.
What should I do if I get an Emergency Alert while driving?
Don’t read or respond to it while driving. Find somewhere safe and legal to stop, then read the alert.
Do Emergency Alerts track my location?
No. GOV.UK says no data about you, your device or your location is collected or shared.
If anyone is in immediate danger, call 999.