No workers inside the building when the fire broke out around 4 a.m.
About 130 complaints have been filed mostly over potential health risks following the Sept. 26 fire.
Cleanup work inside Notre Dame, suspended last month for safety reasons, will resume next week.
Facility processes light hydrocarbons including propane and propylene, materials used to make plastic and industrial products.
Lightning might have been a factor, but fire investigators haven’t been able to start looking for the cause.
Fire broke out at the Philadelphia Energy Solutions Refining Complex.
Automakers were hoping that the plants can return to normal operations as temperatures moderate on Saturday and into next week.
The cause of the blaze remains under investigation.
Evacuation of nearby businesses was lifted after a few hours.
Water to fight the blaze was brought in by neighbouring fire departments for hours.
Recall covers 73,443 Ford Transit vans from 2015 through 2017 that have a trailer tow computer module.
$6 million expansion was added on the decades-old plant last fall.
One worker was injured, taken to hospital in Fort McMurray in serious but stable condition.
Fire at the Mildred Lake upgrader has been isolated and is under control.
Coal-fired generation unit that produces electricity caught fire.