Disable or enable emergency alerts in iOS
Turn emergency alerts on or off on your iPhone, iPod or iPad
Here's how you can toggle emergency alerts on or off on your iOS device.
1. Go to Settings.
2. Go to Notifications.
3. Scroll down to the Government Alerts section.
4. There are two alerts:
5. Tap the switch next to each alert to the On or Off position.
Read more: iLounge