It was first implemented under Obama, but it was authorized by Congress in the 2006 Warning, Alert, and Response Network (WARN) Act. https://www.congress.gov/10

It was first implemented under Obama, but it was authorized by Congress in the 2006 Warning, Alert, and Response Network (WARN) Act. https://www.congress.gov/109/bills/hr5785/BILLS-109hr5785ih.pdf https://www.congress.gov/109/bills/hr5785/BILLS-109hr5785ih.... https://en.wikipedia.org/wiki/Wireless_Emergency_Alerts https://en.wikipedia.org/wiki/Wireless_Emergency_Alerts