Airway & Respiratory | Mass Casualty Incidents | Slideshow

Carbon Monoxide Leak at Texas School

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Texas School-Gas Leak

Jeremy Robison watches as his son Raj Robison is wheeled to a waiting ambulance Thursday, Jan. 28, 2016, after an alleged carbon monoxide leak at Marshall Middle School in Beaumont, Texas, began making students ill. Several dozen students and adults were transported to area hospitals from the event. (Guiseppe Barranco/The Beaumont Enterprise via AP)

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Texas School-Gas Leak

Parents arrive at Marshall Middle School in Beaumont, Texas, Thursday. Jan. 28, 2016, after an evacuation from an alleged carbon monoxide leak. Sick students were transported to local hospitals while unaffected students were taken to West Brook High School. (Guiseppe Barranco/The Beaumont Enterprise via AP)

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Texas School-Gas Leak

Parents arrive at Marshall Middle School in Beaumont, Texas, Thursday. Jan. 28, 2016, after an evacuation from an alleged carbon monoxide leak. Sick students were transported to local hospitals while unaffected students were taken to West Brook High School. (Guiseppe Barranco/The Beaumont Enterprise via AP)

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Texas School-Gas Leak

Parents arrive at Marshall Middle School in Beaumont, Texas, Thursday. Jan. 28, 2016, after an evacuation from an alleged carbon monoxide leak. Sick students were transported to local hospitals while unaffected students were taken to West Brook High School. (Guiseppe Barranco/The Beaumont Enterprise via AP)

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Texas School-Gas Leak

Parents and faculty at Marshall Middle School in Beaumont, Texas scramble to assist sick kids after an apparent carbon monoxide leak Thursday, Jan. 2016, prompted an evacuation. (Guiseppe Barranco/The Beaumont Enterprise via AP)