Hackers blamed for turning on all 156 emergency sirens in Dallas

DALLAS, TX — Hackers struck the sirens Dallas uses to alert residents to take shelter from inclement weather, triggering intermittent false alarms for about an hour and a half until officials deactivated the system early Saturday morning.

The person or people responsible were able to hack into a part of the system that was communicating with all 156 of the city’s sirens, Rocky Vaz, who heads the city’s Office of Emergency Management, said at a news conference.

Technicians were trying to determine how to bring the system back online without the risk of it being hacked again, he said. In the meantime, the public has access to other alert systems. Vaz said he hoped to have the siren system back up by Sunday.