The source of a strong ammonia smell that prompted the hazardous materials closure of a block of South B Street in San Mateo ...

The Vallejo Police Department was evacuated Thursday morning because of a carbon monoxide leak, police said. Dispatchers reported a rotten egg smell around 5:15 ...

A tanker overturned on the Richmond Parkway overpass above Interstate Highway 80 Thursday morning, causing the spilling of liquid asphalt and prompting a ...

Hazardous materials specialists from the California National Guard’s 95th Civil Support Team have been called in to assess a suspicious package shipped to ...

Students and staff at San Bruno's Portola Elementary School are back to class after an investigation into a "suspicious circumstance" found no threats.

San Jose firefighters are asking people to avoid the area around 75 E. Trimble Road on Tuesday morning while they investigate a hazardous ...

A hazardous materials spill led to a shelter-in-place order in Menlo Park Tuesday, according to Menlo Park Fire Protection District Chief Harold Schapelhouman.

An employee was injured Thursday morning by an explosion at the city's water treatment plant, according to a city news release.

Twenty people have been hospitalized at a swim club in San Jose because of a hazardous materials situation.

Shell Oil will pay a settlement to the U.S. Environmental Protection Agency for hazardous waste violations at a crude oil refinery near Martinez.

An incident that made students and teachers ill at Oak Grove High School in San Jose on Wednesday afternoon was likely caused by ...

Six people were taken to a hospital Wednesday afternoon after having symptoms of burning in their noses and mouths.

Two tank cars derailed early Tuesday morning in the Shell Oil Yard in Martinez, but stayed upright and did not spill any hazardous ...

Residents of a homeless encampment near downtown Antioch are being asked to clear out by Monday.

One home has been evacuated and 10 others have been issued an order to shelter in place in San Jose after a construction ...

A substance found Wednesday in a package sent to the Stanford University professor responsible for leading the recall campaign against Judge Aaron Persky ...

A hazardous materials crew tonight is attempting to find the source of an unknown substance at a department store in Antioch, which sickened ...

Whatever hazardous materials were in a room at the Stanford Medical School where a fire broke out this morning were consumed by the ...

An East Bay chemical company and its owner are being indicted on charges of smuggling hazardous materials and conspiracy to defraud the U.S.

Pool chemicals that mixed accidentally caused a hazardous materials incident in a Benicia garage Monday.

An equipment malfunction at the Shell Chemical Company in Martinez resulted in a brief flaring incident Wednesday night.

One crewmember on Alaska Airlines Flight 322 was transported to a hospital Thursday evening due to a hazardous materials incident.

A woman who was exposed to lead oxide in Hollister and then flown to Santa Clara Valley Medical Center in San Jose Wednesday ...

A student exposed to pepper spray released at a San Jose middle school classroom Tuesday morning has been sent to a hospital.

Large amounts of white foam have spilled from a hangar near Mineta San Jose International Airport and blanketed a street in Santa Clara ...

Utility crews have capped a gas leak in San Jose that caused evacuations of several city blocks Tuesday.

Two U.S. Customs and Border Protection employees who felt ill after opening an envelope for inspection in Alameda on Wednesday have been released ...

Palo Alto fire crews responsded to a report of a suspicious odor at the Westin Hotel on El Camino Real Thursday evening.

A property owner may be cited for code violations after fire officials found hazardous waste at an office building in Richmond.

The playground at Mountain Lake Park is set to undergo a much-needed extreme makeover.

A hazardous materials crew is cleaning up a “chemical soup” at an automotive plating and metal work business in North San Jose where a four-alarm ...

More than 20 workers cleaned up an unintended chemical release at Dow Chemical’s waterfront processing facility in Pittsburg Friday afternoon, according to a Dow Chemical ...

Four people were arrested Wednesday after police found guns, cash, methamphetamine and materials commonly used to manufacture the drug while serving a search ...

An overturned tanker that spilled fuel has closed state Highway 1 north of Jenner, a community in Sonoma County, according to the California ...

A hazardous materials team left an area in San Francisco's Sunset District this evening after taking two people to a hospital, a fire ...

A hazardous materials incident in Hayward this afternoon has prompted a widespread shelter-in-place order and a road closure off of state Highway 92, ...