Toxic Underground Fires Are Spreading at California Landfills

Three years ago environmental regulators discovered garbage burning deep inside California's Chiquita Canyon Landfill, reports the Los Angeles Times. [Alternate URL here.] "Few imagined the calamity that would follow. "Somehow the landfill's pollution control system introduced oxygen below, causing decades-old waste to rapidly decompose, generating intense heat and eventually widespread smoldering, federal and state environmental agencies say." The broiling temperatures released toxic gases and hazardous liquid waste that bubbled up to the surface. Residents living in the nearby communities of Val Verde and Castaic have phoned in thousands of complaints about stench and lived with nausea, dizziness and trouble breathing. The underground fire has tripled in size since first confirmed in 2023. Recently a towering mound of landfill garbage perched on the hillside has warped and threatens to trigger an avalanche of garbage and chemical-filled liquid, or leachate, according to the California water board... At first, local officials described the problem in Los Angeles County at Chiquita Canyon landfill as a rare, even unprecedented disaster. But since then, California regulators have learned that at least two other landfills are wrestling with high temperatures and similar conditions. Scorching temperatures have overtaken at least 30 acres of El Sobrante landfill near Corona in Riverside County. Excessive heat and emissions have also been detected at Avenal landfill in the San Joaquin Valley. The discoveries raise an unsettling question: How many landfills are dealing with these disasters? Are they a broader problem in California...? Chiquita Canyon closed at the end of the 2024 and stopped accepting new garbage. But the fire is expected to last for years as it continues to consume decades-old trash. "Underground landfill fires are complex, nearly impossible to extinguish once they break out," according to the article. "As regulators search for a solution, residents find themselves struggling with the wait." Some residents have worn gas masks — or sold their homes.

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