How to Set Up Weather Emergency Alerts on Your Phone
Search for "CMAS" or "WEA" in your phone's messaging settings. You can also dial "##2627##" (minus the quotes) on your phone to turn them on.
If neither of these do the trick, you might not have a phone that is WEA enabled. That's OK, though. You can still get emergency weather alerts with weather apps like the Weather Channel app or WeatherUSA.
WeatherUSA sends out real-time alerts to you every time there’s any weather-related warning in your area. They send these alerts out whenever they are released by any federal agency, including the National Weather Service. These alerts are sent across to the subscribers via SMS or email. You can choose to add your county or state for the local weather warnings.
For Android users, To meet the FCC standards, Android introduced “Emergency Broadcasts” features in all its mobiles. Through this service, you can get severe weather alerts instantly. Apart from these alerts, this feature also sends out an alert whenever there’s any emergency in your area.
Source: USA Today Online