Workers were mixing chemicals used in oil and gas drilling when the first of two explosions occurred at a Tri-Chem Industries plant 25 miles (40 km) southwest of Fort Worth on Thursday, a local official said.
Local authoritieses have so far confirmed that one person was severely burned and was taken to Parkland Memorial Hospital in Dallas.
Another worker was treated for lesser injuries.
The search and rescue mission for the man will resume no sooner than Friday, when the structure burns down and heavy equipment can be brought to the scene to clear rubble, Cresson Mayor Bob Cornett told AP.
Gillum says experts determined there are no air quality issues but the site remains risky because of the hazardous industrial chemicals.
Officials say one of two workers injured in an explosion at a Texas chemical plant has been treated and released from a hospital while another remains hospitalized in serious condition.More news: NCAA Tournament Watch Guide, Day 2: Second Verse, Same As The First?
The worker who dragged his foot while chemicals were being mixed caught fire from the waist up and was airlifted with critical burn injures to a Dallas hospital. One person is missing following the incident and believed to be buried under the wreckage.
Terrifying eyewitness video and photos show a column of flames bursting into the air, leaving thick black smoke billowing in its wake. Crews found nothing before they called off the search last night. They will resume Friday.
The Environmental Protection Agency as well as a hazmat team were at the Tri-Chem Industrial plant throughout the day making sure what left the chemical plant is safe enough for rescuers to go inside to search for Dylan Mitchell.
Firefighters arriving from multiple jurisdictions are working to extinguish the inferno which has engulfed the chemical plant in North Texas, USA.
After a fertilizer plant explosion in the city of West, Texas, killed 15 people in 2013, Greg Abbott, who was then attorney general and is now governor, ruled that state agencies could withhold information about hazardous chemicals because of "ongoing terroristic activity".