Two injured after explosion rips through chemical plant, sparking hazmat response, shelter-in-place order

Two employees were injured Tuesday greeting aft an detonation astatine an Illinois chemic works triggered a ample hazmat effect and prompted a impermanent shelter-in-place bid for adjacent workers.

Authorities said the concern blast occurred soon earlier 8 a.m. astatine the Coogee Chemical installation successful Ottawa, a tiny metropolis southwest of Chicago.

The incidental reportedly progressive a magnesium occurrence — an aggravated and highly unsafe blaze that cannot beryllium extinguished with h2o — that stemmed from an evident malfunction successful oxygen sensor equipment, allowing oxygen levels to rise.

"Early findings suggest the detonation whitethorn person been the effect of instrumentality nonaccomplishment during a process involving the transportation of magnesium into a retention container," the Ottawa occurrence section (OFD) said. 

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First responders and occurrence crews stitchery extracurricular an concern gathering pursuing a reported detonation successful Ottawa, Illinois, connected April 21, 2026. (Fox 32 Chicago)

"A malfunction successful this strategy is believed to person allowed oxygen levels to increase, resulting successful a absorption with the magnesium and causing the explosion." 

Authorities said the 2 employees injured successful the incidental were rapidly transported to a section infirmary for treatment.

One idiosyncratic was rescued from wrong the installation by an archetypal effect team, portion the 2nd was capable to self-evacuate to a adjacent building, the occurrence section said.

"An archetypal introduction squad from the first-due motortruck institution located the archetypal injured worker wrong the operation and rapidly removed the idiosyncratic to awaiting EMS personnel," OFD said. 

The grade of the workers’ injuries remains unclear.

A secondary hunt aboriginal confirmed that each installation unit had been accounted for.

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An aerial presumption of the Coogee Chemical successful Ottawa, Illinois, wherever an detonation occurred connected April 21, 2026. (Fox 32 Chicago)

Crews besides had to usage specialized on-site concern adust chemic agents to safely suppress the magnesium fire, arsenic h2o tin further intensify the reaction.

The occurrence section said the blaze was brought nether power astatine astir 8:14 a.m., astir 15 minutes aft it broke out.

As a information precaution, the Ottawa Police Department and the Illinois Department of Transportation temporarily closed a adjacent road, and individuals successful the country were advised to structure successful place.

Firefighters inspect the interior of a chemic installation aft a blast rocked the manufacturing works successful Ottawa, Illinois, connected April 21, 2026. (Fox 32 Chicago)

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All responding unit underwent modular decontamination procedures connected scene, portion hazmat teams assisted with diligent decontamination astatine the hospital.

The occurrence reportedly caused minimal harm to the facility, and works operations person been suspended pending an investigation.

The Illinois Occupational Safety and Health Administration (Illinois OSHA) is assisting with the investigation.