Zombie Alert issued for Lake Worth Florida?

Lake Worth officials sent out a "zombie alert for Lake Worth and Terminus." The alert warned that less than 7,380 customers were without power due to extreme zombie activity.
The city posted a Facebook message saying the alert was a mistake and that they are investigating.
Opinion - This is likely:
  • A bit of text entered into the alert system that has since been forgotten.
  • A test to gauge public reaction.
  • A hack, but this seems to be the lest likely of the three.
Just in case a fourth option, (a real zombie outbreak occurred and was neutralized), check out the CDC's blog on preparing for the zombie apocalypse: