The communities of Port Neches, Groves, Nederland, Central Gardens, Beauxart Gardens, and portions of Port Arthur are impacted by the order from Jefferson County Judge Jeff Branick.
"I just worry about what we're breathing in," said Laurel Amy who was packing up outside her Port Arthur home Wednesday evening. "It's better to be safe than sorry."
Amy was scheduled to host Thanksgiving. Instead, she and her family are heading to a friend's home in Beaumont.
ABC13 was there as many residents were evacuating. Some opted to stay.
"We feel pretty safe because we really haven't smelled anything in the air," said Craig Wade.
The initial blast happened around 1 a.m. at the TPC Group plant off Highway 366. The facility is approximately 95 miles east of Houston.
Two employees and one contractor were injured in the blast, but all were treated and released from hospitals, officials said.
By early Wednesday afternoon, another blast rocked the plant as personnel continued to fight the fires on site. That explosion was caused by the collapse of a flaring tower, according to Jefferson County Emergency Management Coordinator Michael White.
More flaring towers could also fall as the response continued, White said, and the fire may take days to put out.
Butadiene, a known carcinogen, is the chemical that is burning, according to officials.
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Black debris was seen floating in the air hours after the initial blast, as crews continued to spray water onto the impacted areas of the facility. Residents were advised not to touch the floating debris with their bare hands.
"The black stuff floating, don't touch it," said Troy Monk, who is the director of health safety and security for the TPC Group.
The smoke plume from Port Neches could be seen from as far away as 50 miles by late afternoon.
Windows were shattered and a number of structures were damaged from the initial blast, according to posts on social media.
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Everyone working in the plant was accounted for. There were as many as 27 people on site when the explosion happened, according to officials.
Wednesday evening, the American Red Cross opened a shelter at Ford Park in Beaumont. About 50 people had registered including families with children.
The Texas Commission on Environmental Quality is monitoring air quality around the plant. So far, no elevated levels of concern have been detected, the agency reported.
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