SAN DIEGO (AP) -- An employee removing a piece of monitoring equipment that was causing problems likely caused a massive outage that left more than 2 million people without electricity across the Southwest and northern Mexico.
Dan Froetscher (FRO-shur), a vice president at Arizona Public Service Co., says it wasn't a deliberate act that knocked out power at a substation in North Gila northeast of Yuma, Arizona. He would not say whether it was mistake or how much experience the employee had.
Power officials say the outage should have been limited to the Yuma area. They were investigating why it wasn't contained. Froetscher says they're not absolutely certain the outages are related.
The outage extended to southern parts of Orange County and San Diego and cities south of the border.