The former state worker who is in his 50s spoke to reporters on the condition of anonymity fearing for his safety after receiving threats.
Once the man realised what had happened, he said he felt like he'd sustained a "body blow." Since then, he's reportedly been distressed to the point that he has had trouble eating and sleeping, reported Fox News.
Investigating officer Brig. Gen. Bruce Oliveira explained when the mistake was realized, the employee "froze" and "seemed confused," adding that another employee had to resume his duties and send a correction message.
The ex-worker reportedly had at least two previous incidents in which he mistook drills for real-world events, including for tsunami and fire warnings. However, the man denied, saying that he wasn't aware of any performance problems.
The White House issued a statement on the false alarm, noting that United States President Donald Trump had been briefed on the incident.(ANI)