Investigators say the substation holds about 30,000 gallons of oil. It's unclear how much of it has already burned off.

Crews have not determined the cause of the fire and are working to restore power to affected customers, officials with Oncor said.

A power substation fire in north Fort Worth, sparked by an explosion, has impacted 54 customers. Fire crews and Oncor are working to manage the situation safely, with no evacuations recommended.

An explosion at a power substation in North Fort Worth caused a massive fire Wednesday evening, prompting the voluntary evacuation of nearby homes. The incident, located off Seventeen Lakes Boulevard and Henrietta Creek Road,