How to customize iPhone, Android emergency alert notifications

AUSTIN (KXAN) -- On Friday morning, Texans across the state woke up to their phones buzzing with a Blue Alert from the Texas Panhandle.
A Blue Alert is meant to speed up the capture of an individual who has killed or seriously injured a local, state or federal law officer, according to the Texas Department of Public Safety. This type of alert started back in 2008, when then-Gov. Rick Perry signed the executive order that created it.Blue Alert notifications, similar to an AMBER Alert, can be adju