Today I got a bunch of questions from people who were woke up at 2330 last night because of an Amber Alert on their iPhone wondering what they could do about it. Sadly there’s no way to customize the alerts, they are either off or on.
If you want to turn them off you need to do this:
Launch the Settings App
Tap on Notifications and scroll all the way to the bottom of the page.
Under the Government Alerts section, you’ll see an option to enable and disable both Amber Alert notifications as well as general emergency alerts.