The Disability Advocacy Community has been extensively involved with CMAS/WEA since President Bush signed the WARN Act, passed by a republican house and republican senate, in 2006. The dozens of disability groups helped design the sound and vibration cadence (which is different than EAS), and the policies for alerting. Nation-wide testing (EAS) has been conducted since 2011. And nation-wide testing (WEA) since 2014. National tests were conducted almost every between 2011 and 2020, suspended during the pandemic. The national tests are announced at least 60 days in advance by the FCC and FEMA. News media have multiple stories. Most state and many local goverments also had notifications. If you haven't been involved with the disability community for a decade, and your school office didn't notify special education teachers about the news releases and government advance notifications, perhaps that's room for improvement with local school communications. Fire drills, tornado drills, etc. often involve loud sounds and flashing lights.