The city is now looking at the cybersecurity of its public services. "This is yet another serious example of the need for us to upgrade and better safeguard our city’s technology infrastructure," said Mayor Mike Rawlinson.
At nearly quarter to midnight on Friday, all 156 of Dallas' emergency alarm systems went off. They're designed to warn denizens of the Texas city about severe storms, tornados and other dangerous weather. But there was no sign of any natural cataclysm coming on the weekend. It soon emerged that hackers had set off all 156 of the outdoor warning sirens.
The Dallas Office of Emergency Management swiftly set to work turning all the alarms off before determining how to prevent further attacks.