SAN JUAN, Puerto Rico—A private company announced Monday that power had been fully restored to Puerto Rico’s almost 1.5 million customers nearly five days after a fire at a main power plant sparked an island-wide blackout and prompted public schools and government agencies to close.
Officials are now focused on investigating what exactly caused the failure of a circuit breaker at a substation within the Costa Sur power plant in southern Puerto Rico, one of four main plants in the U.S. territory.
