When an amber alert pops up, what happens 100% of the time is I'm like "holy shit wtf stop that loud noise!" and then after the message is dismissed and untrievable I try to read it, resulting in me having no idea what it said.
Title 47 of the U.S. Code of Federal Regulations, Section 10.500(h) requires the alert to be preserved "in a consumer-accessible format and location for at least 24 hours or until deleted by the subscriber."