On April 17, 2013, an ammonium nitrate explosion occurred at the West Fertilizer Company storage and distribution facility in West, Texas, United States (18 miles (29 km) north of Waco), while emergency services personnel were responding to a fire there. Fifteen people were killed, over 160 injured, and more than 150 buildings damaged or destroyed. Investigators confirmed that ammonium nitrate was the material that exploded. On May 11, 2016, the Bureau of Alcohol, Tobacco, Firearms and Explosives stated that the fire was deliberately set. That finding has been disputed.
West Fertilizer Company had supplied chemicals to farmers since its founding in 1962. As of 2013 it was owned by Adair Grain, Inc. and employed nine workers at the facility. Adair Grain, Inc. is wholly owned by Donald Adair and his wife Wanda.
At the time of the incident, the Occupational Safety and Health Administration (OSHA) last inspected the plant in 1985. According to records obtained by the Associated Press, OSHA cited the plant for improper storage of anhydrous ammonia and fined it $30. OSHA could have fined the company as much as $1,000. OSHA also cited the plant for violations of respiratory protection standards but imposed no fine. OSHA officials said the facility was not on their "National Emphasis Plan" for chemical plant inspections, because it was considered an exempt "retail facility" under an interpretation of OSHA's Process Safety Management standard, the plant had no record of a major accident, and the Environmental Protection Agency did not consider it a major risk. After a complaint in 2006 about an ammonia smell coming from the facility, the Texas Commission on Environmental Quality investigated and cited the operator for lacking a permit for two storage tanks containing anhydrous ammonia. A permit was issued once the operators brought the facility into accord with agency regulations and recommendations. Also in 2006, the EPA fined the owners $2,300 for problems including not filing a risk management program plan on time. In June 2012, the US Department of Transportation's Pipeline and Hazardous Materials Safety Administration further fined the facility $5,250 for violations regarding anhydrous ammonia storage.
According to an open records request by Reuters, the plant had a long history of minor thefts, presumably by people wanting to use anhydrous ammonia to make methamphetamine. The facility lacked burglar alarms or a fenced perimeter. It installed a surveillance system in 2009 after law enforcement recommended it do so.
In an emergency planning report filed with the EPA in 2011, company officials said the anhydrous ammonia storage tanks did not represent a significant fire or explosion hazard. Indeed, the tanks were still intact following the nearby fire and explosion.
According to its last filing with the EPA in late 2012, the company stated that it stored 540,000 pounds (270 short tons; 240 t) of ammonium nitrate and 110,000 pounds (50 t) of anhydrous ammonia on the site. A week after the explosion, Homeland Security Secretary Janet Napolitano told Senate investigators that the company did not appear to have disclosed its ammonium nitrate stock to her department. Federal law requires that the Department of Homeland Security (DHS) be notified when anyone has more than one ton of ammonium nitrate on hand, or 400 pounds (180 kg) if the ammonium nitrate is combined with combustible material.
The facility caught fire on Wednesday, April 17, 2013, and roughly 20 minutes after it was first reported to emergency dispatchers, the site exploded. At 7:50:38 p.m. CDT (00:50 UTC, April 18), as firefighters were attempting to douse the flames, it exploded – actually two explosions milliseconds apart – with the force of 7.5-10 tons of TNT. The explosion created a 93-foot-wide (28 m) and 12-foot-deep (3.7 m) crater where the fertilizer plant had been, and resulted in 15 deaths and at least 200 injuries.
After weeks of investigation, the cause of the initial fire remained unknown; authorities ruled out weather, natural causes, anhydrous ammonia, and ammonium nitrate in a rail car as possible causes. In May 2016, the ATF announced that they had determined the fire had been deliberately set. This finding is widely disputed, however; there were no named suspects or arrests made, leading to legal and forensic experts criticizing the ATF investigation.
The massive explosion obliterated the West Fertilizer Company plant and caused heavy damage and further destruction to surrounding areas.
In addition to the obliterated plant, damaged buildings included the public West Middle School, which sits next to the facility. A neighboring 50-unit, two-story apartment building was destroyed.
The blast damaged the nearby West Rest Haven nursing home, and many residents were evacuated. Many nursing home residents received cuts from flying glass, but emergency personnel on scene judged that most such injuries were not life-threatening.
On April 20, some residents who tried to return to their destroyed homes were turned away, because leaking gas tanks were causing small fires.
According to the company's insurer, United States Fire Insurance of Morristown, New Jersey, the facility was only covered by $1 million in liability insurance. According to official estimates from both state and company officials, this amount did not even begin to cover the cost of damages. Furthermore, according to The Dallas Morning News, Texas law allows fertilizer storage facilities to operate without liability insurance, even when they store hazardous materials.
West Mayor Tommy Muska told the Waco Tribune-Herald that as of late evening, April 17, six or seven volunteer firefighters from the city were unaccounted for. West EMS Director Dr. George Smith, himself injured, said he believed at least two emergency responders were killed.
"We do have confirmed fatalities," Texas Department of Public Safety spokesman D.L. Wilson said at a midnight news conference on April 17. "We have a tremendous amount of injuries ... over 100 injuries at this time." Wilson did not confirm or deny an earlier report deaths could number in the range of 60 to 70. He said the blast zone was "just like the Murrah Building in Oklahoma City," comparing its effects to the Oklahoma City bombing, and that "50 to 75" homes and businesses were damaged. Sergeant William Patrick Swanton of the Waco Police Department said the operation had entered "search-and-rescue mode" to find survivors and recover those perhaps trapped in buildings. He said at least 160 people were injured, and the firefighters combatting the initial fire were still unaccounted for. Swanton quoted local environmental officials and emergency personnel in saying there was no risk to the community from the smoke fumes rising from the facility.
Over 100 people were reported injured in the blast, and were originally transported to a makeshift triage set up at West High School's football field. The triage site later was moved to a community center due to the football field's proximity to the still-burning facility. Hillcrest Baptist Medical Center in Waco received over 40 injured for treatment. Patients were also admitted to Waco's Providence Healthcare Network, Fort Worth's John Peter Smith Health Network, Dallas's Parkland Memorial Hospital, and Temple's Scott and White Memorial Hospital.
Authorities announced on April 19 that twelve bodies had been recovered, sixty people were missing, and at least 200 had been injured. The 12 dead included 10 first responders as well as two civilians who had volunteered to fight the fire.
The final confirmed death toll was 15 fatalities, and approximately 160 to 200 people were injured.