Because sending a text is modern and not old. Just like electric vehicles. Who needs a reliable internal combustion engine car. Tried and true methods don’t work in the modern age.
Those old farts don’t know jack
Sirens would have been better in all seriousness. The old ways work in many cases.
Those air-raid sirens in London during The Blitz sure did the trick. That’s a sound you never want to hear.
After this incident that ended up having many people killed, they should practice using the sirens yearly.
Kind of like our schools having fire drills.
Hawaii is an island. So they need to be prepared for it to explode anytime.