LA HABRA, Calif. — A Southern California neighborhood was thrown into an emergency Tuesday after a hazardous chemical incident sent a yellow-orange plume of smoke into the air, prompting evacuations and a major response from fire and hazardous-material crews.
Emergency personnel responded to a reported chemical leak near 334 S. Cypress St. in La Habra after authorities received a call about a possible hazardous materials incident at approximately 11:53 a.m. Tuesday.
The incident involved what authorities described as a dangerous reaction involving nitric and phosphoric acid at a factory that manufactures industrial chemicals.
The sudden appearance of the smoke plume raised concerns about potentially toxic fumes spreading into nearby neighborhoods, leading officials to take immediate protective measures.
One-Mile Evacuation Zone Ordered
Residents and businesses within a one-mile radius of the site were ordered to evacuate as emergency crews worked to determine the source of the leak and control the situation.
La Habra Mayor José Medrano said in a social media update that authorities had blocked off a large portion of the surrounding area while evacuations were underway.
“All areas east of Euclid St to Harbor Blvd and Cypress St between La Habra Blvd and Lambert Rd are blocked off evacuations are being made, please stay out of the area,” Medrano said.
Officials also warned people who were downwind of the plume to take shelter indoors if they could not immediately evacuate. Residents were advised to close all windows and doors and shut off HVAC systems to reduce the possibility of contaminated outdoor air entering buildings.
The emergency response included local first responders and specialized HazMat teams, who worked to identify the source of the chemical release.
Smoke Plume Raises Concerns for Nearby Residents
According to the Los Angeles County Fire Department, responding crews found an industrial facility with an orange smoke plume coming from the roof.
The department said the leak was subsequently mitigated and the visible plume dissipated.
Firefighters and specialized crews focused on locating the source of the chemical reaction, which was believed to involve a compromised storage tank.
The situation initially raised concerns that changing atmospheric conditions could push the plume farther into surrounding residential areas.
At least one person sustained minor injuries, while paramedics evaluated three other people who were experiencing different levels of physical distress.
Authorities continued assessing those affected as the HazMat operation moved forward.
HazMat Crews Confirm Leak Is Under Control
After working at the facility, Los Angeles County Fire Department HazMat teams verified that the chemical leak had been brought under control.
Officials said the plume had dissipated and that there was no active risk to residents. Even after the immediate danger was contained, crews continued monitoring the air around the area as a precaution.
The response highlights how quickly an industrial chemical incident can affect surrounding communities, particularly when a visible plume raises concerns about exposure and wind conditions.
Authorities initially urged residents to stay away from the affected area while emergency crews carried out their work.
Investigation Continues After Evacuation
Officials are continuing to investigate the circumstances surrounding the chemical leak, including what caused the reaction and how the storage system became compromised.
The incident temporarily turned part of La Habra into an emergency response zone, with roads blocked and residents and businesses within the evacuation area ordered to leave.
While the situation caused significant concern among people living and working nearby, authorities later confirmed that the leak was controlled and the plume had dissipated.
Air monitoring remains an important part of the response as officials continue checking conditions around the facility.
For now, authorities are emphasizing that there is no active threat to residents, while the investigation into the chemical incident continues.
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