SANTA ANA, CA — Santa Ana police, SoCal Edison and Orange County Fire Authority raced to the scene of an exploded transformer vault.

Multiple residents called 911 at about noon, Wednesday, telling dispatch operators that they heard "several explosions,"on the 3000 block of S. Harbor Boulevard, Santa Ana Police Sgt. Anthony Bertagna reported.

Nearly 50 homes and businesses were left without power, according to SoCal Edison.