California issues urgent warning after cluster of deadly mushroom poisonings tied to death caps
California health officials issued a statewide warning after 21 confirmed amatoxin poisonings in recent weeks — including one adult death and several severe liver injuries — linked to death cap mushrooms flourishing after wet weather.
Key takeaways
- 21 confirmed amatoxin cases reported across California in recent weeks. (Source: ABC7 News)
- At least one adult death and multiple patients, including children, with severe liver damage have been reported. (Source: ABC7 News)
- Clusters tied to likely death caps (Amanita phalloides) in Monterey County and the San Francisco Bay Area; officials warn risk is statewide. (Source: ABC7 News)
Main story
What happened
California’s Department of Public Health (CDPH) and the state poison control system have reported 21 confirmed amatoxin poisonings over recent weeks. Officials link many cases to mushrooms gathered on public and private lands and mistakenly eaten as food. The cluster includes one confirmed death and multiple patients with severe liver injury; some required intensive care and at least one was evaluated for liver transplant consideration. (Source: ABC7 News)
Where cases were found
Health officials identified clusters in Monterey County, where people became ill after eating mushrooms collected in a local park, and in the San Francisco Bay Area. Erica Pan, communicable disease director at CDPH, emphasized the danger is not limited to those counties; the state has issued a warning urging residents across California to avoid foraging during this high-risk period. (Source: ABC7 News)
Why this is happening now
Recent wet weather has produced rapid growth of wild mushrooms across the state. Death cap mushrooms thrive in wet seasons and often grow near oaks and other hardwoods, particularly in coastal and central California. That mushroom boom increases the chance people will encounter and mistake toxic species for edible ones. (Source: ABC7 News)
The mushrooms and the toxins
The illnesses involve amatoxins, potent liver-damaging compounds found in death caps and some other Amanita species (often called “destroying angels”). Amatoxins can cause acute liver failure and death. Importantly, cooking, drying, or freezing does not destroy amatoxins, so traditional food-preparation methods will not make a toxic mushroom safe. (Source: ABC7 News)
Symptoms and medical risk
Typical early symptoms after eating amatoxin-containing mushrooms include stomach pain, nausea, vomiting and diarrhea, often beginning within about 24 hours. Those symptoms may temporarily subside, which can be misleading. However, amatoxins continue to damage the liver even after apparent improvement, potentially leading to severe liver injury, the need for intensive care or liver transplant, and death. Anyone who ate a wild mushroom and becomes ill should seek immediate medical care. (Source: ABC7 News)
Who is most at risk
People who forage or cook wild mushrooms without expert identification are at direct risk. Children are a significant concern — national data show thousands of mushroom exposures are reported each year and many involve young children who find mushrooms while playing outside. In California, hundreds of mushroom poisonings are reported annually; the state’s wet winters and public interest in foraging make outbreaks more likely. (Source: ABC7 News)
Official guidance and warnings
CDPH and local health officials advise:
- Do not eat any wild mushroom unless identified as safe by a very experienced mycologist.
- Do not rely on color, taste, or home “tests” such as the silver spoon test — they are unreliable.
- Cooking, drying, or freezing does not remove amatoxins.
- If you suspect ingestion or develop symptoms, seek medical care immediately and call the Poison Control Hotline at 1-800-222-1222 for guidance. (Source: ABC7 News)
“Avoid picking and eating wild mushrooms during this high-risk season,” said Erica Pan, CDPH communicable disease director, urging caution statewide.
How clinicians and poison centers respond
America’s Poison Centers (reach via 1-800-222-1222) can provide immediate guidance to the public and to clinicians treating suspected mushroom poisonings. In suspected amatoxin cases, hospitals monitor liver function closely and provide supportive care; some medical therapies may slow toxin uptake and protect the liver. In the most severe situations, a liver transplant may be required. Early recognition and rapid care are critical because symptoms can worsen after seeming improvement. (Source: ABC7 News)
Broader context: why California sees these outbreaks
Amatoxin-containing species are among the deadliest mushrooms worldwide. While thousands of mushroom exposures occur in the U.S. annually, a small fraction involve amatoxins. California’s wet winters, widespread hardwoods and active foraging culture create recurring conditions for serious poisonings and public health advisories during rainy seasons. (Source: ABC7 News)
Implications for the Inland Empire, California
Economic: A statewide warning could reduce park-based foraging events and affect local nurseries and retailers selling foraging gear. Emergency departments in Riverside and San Bernardino counties should be prepared for potential cases, increasing short-term clinical costs.
Political: Local leaders may face pressure to boost public safety messaging, coordinate with state health officials, issue region-specific advisories, and consider signage or temporary restrictions in parks where toxic mushrooms grow.
Social & cultural: Families should be vigilant, especially where children play. For communities where foraging is culturally important, officials urge relying on highly trained experts and avoiding eating mushrooms unless identification is certain.
Practical actions for residents:
- Avoid picking or eating any wild mushrooms this season.
- Wear gloves to remove suspicious mushrooms from yards or playgrounds and dispose of them safely.
- Keep pets away from wild mushrooms; animals can be poisoned too.
- Post the Poison Control Hotline (1-800-222-1222) in community centers, schools, and social groups.
- Report clusters of illness to local public health departments so officials can track outbreaks. (Source: ABC7 News)
What to do now
If you or someone in your care may have eaten a wild mushroom, or if you develop stomach symptoms after eating mushrooms, seek medical care immediately and call 1-800-222-1222 for immediate poison control guidance.
Preserve any remaining mushroom material in a paper bag (not plastic) to help with identification. Treat even mild early symptoms seriously because amatoxin-related liver damage can progress rapidly. (Source: ABC7 News)
Sources
Original reporting and official statements: ABC7 News
