Fire Engulfs Process Unit at Pennsylvania Refinery Owned by Delta Air Lines

A blaze broke out around 11:30 a.m. on June 25, 2026, at Monroe Energy LLC's Trainer refinery in Delaware County, Pennsylvania, according to local media. The incident occurred at the facility on the 4100 block of Post Road in Trainer. Company officials reported that the flames originated in a process unit pump room, producing a tall plume of dark smoke visible from the site. One person suffered injuries while emergency crews worked to contain the fire.

Air quality prompts shelter-in-place advisory. Trainer Borough Police described conditions as reaching a "nuisance" level and advised residents living within a half mile of the refinery to shelter in place. Monroe Energy said in a statement that its own air monitoring results show no risks to the community at this time.

The cause of the fire remains undetermined. Firefighters continued battling the flames throughout the afternoon.

Refinery ownership and local response. Monroe Energy, a subsidiary of Delta Air Lines, operates the Trainer facility. Officials in the nearby borough of Marcus Hook urged people to steer clear of the area, though no evacuation orders have been issued.

Incident details remain limited. Monroe Energy has not disclosed further specifics on the extent of damage or expected timeline for resolution. Local authorities continue to monitor the situation on the ground.