Hackers took control of the emergency tornado alarms in Texas causing the panic, it has happened on March 12th, at around 2:30 a.m. in two towns in Texas (the DeSoto and Lancaster areas) Hackers raised at least 30 alarms, twenty of them were raised in Lancaster and the rest in De Soto. The alarm systems remained offline until Monday 17th March, fortunately, there were no imminent risks of tornados in that period. Police are investigating the intrusion in the alarm systems of the two towns.”]
Source: https://securityaffairs.co/wordpress/82854/cyber-crime/emergency-tornado-alarms-hack.html