Cryptic emergency alert panics Oregon city’s residents

Supermarket shelves are stripped bare of bottled water in Salem, Ore., late Tuesday May 29, 2018, after officials warned residents that tap water was unsafe for children and the elderly due to an algae bloom. The head of Oregon's emergency management agency has apologized after a cryptic emergency alert was forced out to cellphones in and around Oregon's capital city, displaying the words "Civil Emergency" and "Prepare for Action," but carrying little other information. (AP Photo/Tom James)

SALEM, Ore. — Oregon’s emergency alert systems blasted a cryptic alert to cellphones around the capital city, panicking residents by telling them simply “Civil Emergency” and “Prepare for Action” and leaving off that the threat was toxic algae at a local water supply.