Here’s how it looked on the CW.
And here’s how it looked on KRTV.
The text of the warning read:
Civil authorities in your area have reported that the bodies of the dead are rising from their graves and attacking the living. Follow the messages onscreen that will be updated as information become available. Do not attempt to approach or apprehend these bodies as they are considered extremely dangerous.
As far as pranks go, it’s a pretty funny one though, according to Deadline, some viewers were concerned enough to call the cops. Oops. I do hope nobody particularly vulnerable was caught out.