Several explosions at a Houston-area chemical plant were reported on early Thursday morning, reportedly related to its loss of power. Black smoke billowed from the Arkema Inc. chemical plant in Crosby, Texas as blasts rocked the site, which remains submerged under six feet of floodwater. The Arkema plant is one of many in the region; this part of Texas is home to the one of the densest concentrations of pipelines, refineries and chemical plants in the country. The storm damage is certain to exacerbate the public health threat of Hurricane Harvey long after the rain has stopped.

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On Tuesday, prior to the explosions, officials ordered a mandatory evacuation zone for a 1.5 mile radius surrounding the plant. The Arkema plant was shut down before Hurricane Harvey made landfall in the Houston-area, though 11 employees remained behind to service the facility. As the unprecedented floodwaters pushed in, the remaining team was evacuated as fumes began to pour out of the powerless plant. Several deputies from the Harris County Sheriff’s office were hospitalized for inhaling toxic chemicals.

Related: 7 ways you can help people affected by Tropical Storm Harvey

Arkema produces organic peroxides, compounds with a wide variety of applications, from construction materials to pharmaceuticals. Usually the volatile chemicals are kept under control through cold storage. However, without power, there is no refrigeration. “As the temperature rises, the natural state of these materials will decompose. A white smoke will result, and that will catch fire,” Arkema spokesperson Janet Smith told press.

Arkema was previously mandated by the EPA to produce a report outlining the potential risks of the plant and plans for worst-case scenarios, which, according to Arkema’s submitted report, could potentially impact 1.1 million residents over a distance of 23 miles. However, the company reports that it is incorporating “multiple layers of preventative and mitigation measures” to ensure that the worst does not come to pass.

Via Time and Washington Post

Images via Google Maps