I had it turned off before, but can't find it anymore...
Sorry folks, but I don't want the air raid siren at 2AM....I'm not going to see a kid from 200 miles away from my bedroom.
Fix the system, and I'd be less inclined to silence it....like, only get alerts when the phone is moving about...
Go to Apps
Select Emergency Alerts
Press the 3 vertical dots to enter the Settings
Select Alert Types
You can turn off all alerts except for Presidential alerts