Not sure about how automated alerts work but I suggest manually subscribing to your local emergency websites. For example, I am subscribed to https://www.nixle.

Not sure about how automated alerts work but I suggest manually subscribing to your local emergency websites. For example, I am subscribed to https://www.nixle.com/ https://www.nixle.com/ which subscribes you to local emergency alerts. I received notifications from them in addition to the default ones.