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Reported directly by WHYY — the official primary source for this announcement.

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Home/Energy/Fire Engulfs Process Unit at Pennsylvania Refinery Owned by Delta Air Lines
VERIFIEDBy Xavier Rivera· ·1 min read

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

A large fire broke out at Monroe Energy's Trainer refinery in Pennsylvania on June 25, prompting a shelter-in-place order for nearby residents. The Delta Air Lines subsidiary reports no community health risks from its air monitoring, while firefighters continue battling the blaze that started in a process unit pump room.

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Fire Engulfs Process Unit at Pennsylvania Refinery Owned by Delta Air Lines
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TL;DRAI · 60 sec read

A fire broke out at the Trainer refinery in Delaware County, Pennsylvania, owned by Delta Air Lines subsidiary Monroe Energy on June 25. Flames in a process unit injured one person and sent up dark smoke, prompting a shelter-in-place advisory for residents within half a mile over air quality. The company reported no community risks.

✓ Resolved2 updates

Fire extinguished and shelter-in-place advisory lifted with no ongoing threat to community.

Jun 25, 6:17 PM ET
Jun 25, 4:17 PM ET

The fire at the Monroe Energy Trainer refinery was contained by around 1:30-2:44 p.m. on June 25; shelter-in-place advisory for residents within a half-mile remains active with possible ongoing road closures.

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.
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.
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.
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The cause of the fire remains undetermined. Firefighters continued battling the flames throughout the afternoon.
Officials in the nearby borough of Marcus Hook urged people to steer clear of the area, though no evacuation orders have been issued.
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.
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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.
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