iPhone will make a ‘special sound’ on Oct 4–here’s why

Why can’t these headlines be direct?

“iPhone will make a ‘special sound’ for US residents on Oct 4th for FEMA test”

… or something akin to that. Even revealing the articles “secret”, it’s still useful to read for the details or how to disable the alert.

Only in the US and with operators that are participated with WEA.