Over 40,000 evacuated in California chemical leak as Orange County officials warn tank “is going to fail,” may explode
Over 44,000 Residents Still Under Evacuation Orders as Orange County Faces Chemical Leak Crisis
Over 40 000 evacuated in California - On Saturday, more than 44,000 individuals remained displaced in several Southern California communities after emergency personnel issued a dire warning about a chemical tank at an aerospace facility in Garden Grove. Officials from the Orange County Fire Authority (OCFA) indicated the tank, which holds methyl methacrylate, was on the verge of catastrophic failure. The situation escalated rapidly, prompting widespread evacuations and heightened safety protocols across the region.
Threat of Tank Failure and Potential Explosion
Orange County Fire Authority Chief Craig Covey described the scenario as one of the most perilous he has encountered during his 32-year career. Speaking at a press briefing on Friday afternoon, Covey emphasized the tank’s imminent risk, stating,
“This is gonna happen unless some brilliant guy behind me here figures out how we can mitigate this incident. This thing is gonna fail. We don’t know when.”
He further remarked that the incident was “as bad as I’ve ever seen,” underscoring its real and immediate danger. “This is real, don’t mess around,” he added, reflecting the urgency of the situation.
The industrial tank, part of a larger complex at the facility, is estimated to hold approximately 7,000 gallons of methyl methacrylate. Covey highlighted the chemical’s dual nature as a “highly volatile” and “highly flammable” substance critical to plastic manufacturing. The risk of an explosion or massive spill was compounded by the tank’s compromised cooling system, which left it vulnerable to thermal stress. Firefighters worked tirelessly to stabilize the temperature, keeping it at around 61 degrees Fahrenheit as of 7:45 p.m., according to OCFA reports.
Two Major Scenarios: Spill or Explosion
Covey outlined two potential outcomes: either the tank would rupture, releasing between 6,000 and 7,000 gallons of toxic fumes into the surrounding area, or it would enter a thermal runaway state, triggering an explosion that could impact adjacent tanks containing flammable materials. The latter scenario posed an even greater threat, as the chemical’s self-heating properties could accelerate the disaster. “In an uncontrolled environment with a leak, you can potentially have a lot in the atmosphere, and any flash or spark or even temperature can cause what,” Covey explained, detailing the chemical’s volatility.
The OCFA team remained vigilant, deploying drones to monitor the tank’s exterior temperature and continuously assessing the situation. Despite their efforts, the timeline for the tank’s failure remained uncertain, leaving residents in a state of heightened alert. “We don’t know when it’s going to end,” Covey said, acknowledging the unpredictable nature of the crisis. “We’re not giving up. We’re not going to let this just go.”
Collaborative Efforts to Mitigate the Crisis
Officials stressed the importance of collaboration, assembling a specialized team to brainstorm unconventional solutions. This group, including experts from across the state and country, was working to depressurize the affected tank and reduce exposure risks. Covey noted that while the tank was no longer actively leaking gas, the situation was far from resolved. “Right now, there is no active gas leak coming off that thing,” he said, adding that air quality was stable, with no harmful particulates detected in the immediate vicinity.
Covey expressed confidence in their ability to prevent the worst-case scenario, stating,
“It is not okay with me just to sit back and watch this thing blow up or fail. That is not acceptable to me.”
His team was developing “contingency plans” to address possible explosions or fires, while also exploring alternative strategies to delay the tank’s failure. “Our group is going to do everything they can to come up with a third, a fourth, a fifth option that is not failure,” Covey declared, vowing to keep the public safe.
Chemical Properties and Health Risks
Details about methyl methacrylate were shared with CBS LA, shedding light on its hazardous characteristics. This flammable epoxy, used in the production of plastics, has a boiling point lower than water and generates heat through self-ignition. Health experts warned that exposure to the chemical could cause respiratory irritation, skin and eye discomfort, nausea, and dizziness. Additionally, its vapor is denser than air, allowing it to settle and accumulate in low-lying areas, increasing the risk of inhalation.
Covey and other officials emphasized that while the chemical poses significant dangers, the current environment had prevented an active plume from forming. However, they cautioned that the risk of a sudden release remains high, especially if the cooling system fails. “We want to prepare for the worst, but expect for things to get better,” he said, highlighting the proactive measures being taken to safeguard the community.
Continuous Monitoring and Evacuation Updates
As the situation unfolded, aerial footage captured firefighters using unmanned hoses to douse the tanks, maintaining their stability. OCFA Captain Wayhowe Huang confirmed that drones were deployed to track the tank’s temperature in real time, ensuring that any fluctuations were promptly addressed. “Crews are still trying to get creative” for a long-term solution, Huang stated, reflecting the ongoing efforts to contain the leak.
Residents were advised to stay indoors due to lingering concerns about air quality. While there was no active contamination in the immediate vicinity, the potential for a sudden release remained a constant threat. Covey acknowledged the community’s resilience, noting that the evacuation process had been managed with precision. “We’ve been able to keep people safe while we work on stabilizing the situation,” he said, emphasizing the balance between urgency and careful planning.
As of Saturday morning, Covey shared an update on the team’s progress, stating that alternative solutions had been identified and were being implemented. “The group assigned to coming up with alternative solutions has come up with some tremendous ideas that we’re gonna start taking action on,” he said in an X post. This collaborative approach underscored the commitment to finding a way to prevent the tank’s failure, even as the threat of disaster loomed large.
Looking Ahead: A Race Against Time
With the tank’s condition remaining precarious, officials were focused on finding a definitive resolution. Covey’s team was preparing for multiple contingencies, including a sudden explosion or a large-scale spill, while simultaneously working to delay the worst-case scenario. “We’re not just reacting to the problem—we’re trying to solve it,” he said, reflecting on the strategic mindset required to tackle the crisis.
Despite the challenges, the OCFA reported progress in stabilizing the tank. The purge valve, which had been continuously releasing vapors, was no longer active, reducing the immediate risk of chemical dispersion. However, the team remained on high alert, ready to respond to any unexpected developments. “We have cooled it down enough that the purge valve is no longer purging any kind of product from the liquids there,” Covey said, highlighting the temporary success of their efforts.
As the situation evolved, the focus shifted to minimizing long-term impacts. Officials emphasized the importance of public cooperation, urging residents to remain indoors and avoid exposure. The evacuation orders, while disruptive, were deemed necessary to ensure safety. “We want to protect people as much as possible,” Covey stated, underscoring the mission-driven approach of the emergency response team.
With the tank’s fate hanging in the balance, the Orange County Fire Authority continued to work alongside experts, leveraging all available resources to find a solution. The incident served as a stark reminder of the vulnerabilities in industrial chemical storage and the critical need for rapid, coordinated responses. As the team pressed forward, the community watched closely, hoping for a resolution that would allow them to return to normalcy soon.