A tanker truck leaked dangerous ammonia gas in an Oklahoma hotel parking lot Wednesday night, prompting dozens of guests to be hospitalized, including 11 who were in critical condition.
Anhydrous ammonia leaked from a tanker truck in the parking lot of the Holiday Inn Express & Suites in Waterford, a small city about 70 miles west of Oklahoma City, around 10 p.m. Up to 600 people were evacuated to a shelter early Thursday, while other residents living nearby were ordered to shelter in place.
Thirty-six people were hospitalized, including 11 who were in critical condition, KOCO reported.
Officials lifted a shelter-in-place order Thursday morning after firefighters wearing gas masks went door-to-door waking people up and telling them to leave because of the fumes from the leak.
The tanker truck, which was carrying 25,000 pounds of anhydrous ammonia, suffered a spill as a result of a leaking gasket, according to KOCO. It was not immediately clear if all of the oil it was carrying had spilled.
Anhydrous ammonia is a colorless gas that is used as a farm fertilizer to grow corn and wheat, but it can be deadly at high concentrations. Touching the chemical, either as a liquid or gas, can cause burns.
Authorities said the driver of the truck had parked it behind the Holiday Inn Express & Suites to get a room there for the night.
The spill prompted nursing home residents to be evacuated and nearby public schools to shutter Thursday. The Southwestern Oklahoma State University also canceled in-person classes, though online classes were unaffected.
Cleanup could take several days, Weatherford Police Chief Angelo Orefice said.
In the aftermath, police are now urging residents to stay vigilant for any symptoms they may have after ammonia exposure.
“We are asking the public to watch each other,” Orefice said. “If they’re having breathing problems, call 911 or go to the emergency room.”
An explosion at a hydrogen and nitrogen product plant in Mississippi last week also caused an anhydrous ammonia leak and forced nearby residents to evacuate their homes. No deaths or injuries were reported.
With reporting by the Associated Press.