Crews Inspect Crack in Damaged Garden Grove Chemical Tank as 50,000 Evacuate

Southern California officials were still working Sunday to prevent either an explosion or a large chemical release from a damaged tank at an industrial facility in Orange County, where more than 50,000 people have already been evacuated, according to reports from CBS Los Angeles and The Independent. The tank, at GKN Aerospace in Garden Grove, is estimated to contain about 7,000 gallons of methyl methacrylate, a volatile, highly flammable industrial liquid used in making resins and plastics.

The crisis has unfolded over several days and has so far produced no injuries, but authorities say the situation remains dangerous. Officials initially believed crews might be able to stabilize the tank, but on Friday they concluded the main tank in distress could not be secured or mitigated. That left responders focused on preventing two main risks: a total spill of the chemical into the surrounding area or a thermal runaway, a chain reaction that could cause the tank to overheat and explode.

A possible breakthrough came Sunday when crews identified what appeared to be a crack in the tank that may be relieving pressure. Orange County Fire Authority officials told CBS Los Angeles they were sending in a crew to inspect whether the crack was a pressure-release point, which would be a “good thing,” in the words of one official quoted by the station. If confirmed, that could reduce the chance of either an explosion or a toxic vapor cloud. Officials also said the crack could instead have been caused by vapor buildup, which might still lead to rupture.

The evacuation zone has remained large, and shelters have continued to open for displaced residents. One local broadcast report said a fourth shelter was opened as thousands of people remained out of their homes, while officials estimated that a significant minority of affected residents had chosen to stay despite the evacuation orders. Local authorities have urged residents to leave the area while the tank is still unstable, warning that conditions could change quickly if the tank heats up further.

The chemical involved matters because methyl methacrylate is both flammable and hazardous if released in large quantities. If the tank fails, officials say, the liquid could spill into the parking lot and surrounding area; if it overheats, it could trigger an explosion and damage nearby tanks containing fuels or chemicals. The cause of the leak remains under investigation, and it is still unclear whether state or federal agencies will assist on site.

For now, emergency crews are in a race against time to find a safe way to relieve the pressure, stabilize the tank, and protect nearby neighborhoods. The episode has highlighted how a single industrial failure can quickly turn into a large-scale public safety emergency, forcing evacuations, straining shelters, and leaving thousands of residents waiting to learn when they can go home.