The fire broke out in a transformer at LUMA’s Monacillos substation, the firm mentioned. Personnel from the Puerto Rico Police, Fire Department and Medical Emergencies are at the scene and no accidents have been reported.
Calling it an explosion, Gov. Pedro Pierluisi mentioned that each state and federal regulation enforcement authorities are investigating the trigger.
“All the resources of the PR government are available to handle the emergency caused by the fire at the Monacillos substation in Río Piedras. Firefighters have already arrived on the scene to handle to the situation. As soon as [firefighters] confirm more details, we will let you know,” Pierluisi mentioned on Twitter.
“The priority must be to re-establish the electrical service as soon as possible and our people can rest assured that we are making sure that this is the case. At the same time, as soon as we have the results of the investigations related to the cause of this incident, whoever is responsible for it will have to answer to the People of Puerto Rico,” he mentioned.
“The FBI is evaluating the situation concerning the massive black out,” FBI San Juan public affairs officer Limary Cruz-Rubio informed NCS Thursday evening, however wouldn’t remark additional on the matter.
Website hit by cyberattack earlier that day
LUMA Energy mentioned it was the sufferer of an earlier Distributed Denial of Service assault, during which a website is intentionally hit by huge quantities of internet site visitors in an try to overwhelm it.
“The DDoS attack was identified and has been issuing 2 million visits per second,” LUMA Energy mentioned in a press release. “As a result, many clients may have had difficulty accessing the information related to their accounts.”
There was no fast indication of any connection between the web site assault and the substation explosion.
“The attack has been reported to the relevant authorities and LUMA awaits the results of an ongoing investigation,” in accordance to the press launch.
LUMA is a three way partnership of Quanta Services and the Canadian power firm ATCO, which was chosen by the Puerto Rican authorities to take over the operation of the power grid from its earlier public electrical utility, PREPA. LUMA has been accountable for the power grid since June 1.
NCS’s Christina Carrega contributed to this report.