Anna Fire Department issued the following announcement on Sept. 15.
The Federal Emergency Management Agency (FEMA), in coordination with the Federal Communications Commission (FCC), will conduct a nationwide test of the Emergency Alert System (EAS) and Wireless Emergency Alerts (WEA) on September 20, 2018.
The IPAWS National Test | FEMA.gov
IPAWS National Test of the Emergency Alert System (EAS) and Wireless Emergency Alerts (WEA)
Original source can be found here.
Source: Anna Fire Department