Deadly 'Shroom Boom' Claims Lives in California

California is experiencing an alarming outbreak of wild mushroom poisonings, with four deaths and 40 hospitalizations reported between late November 2025 and early February 2026. This is an unprecedented situation, far exceeding the state's average of fewer than five cases annually. The dangerous fungus responsible is the death cap (Amanita phalloides), which can be easily mistaken for edible varieties. Ingesting even half a cap can be fatal, with mortality rates as high as 50%. Central Mexico, where mushroom foraging is common, has a strong cultural connection to the affected communities, particularly in Salinas, the epicenter of the initial incidents. Experts believe many likely mistook death caps for familiar edible species from their home country. The poisonings have impacted diverse linguistic groups, prompting the state to release advisories in nine languages. Experts attribute the rise in dangerous fungi to a wet winter, which promotes mushroom growth, and potentially to climate change, which may be introducing less common species to new areas. The season for death caps is concluding in Southern California but continues in the north. The western destroying angel mushroom is also highlighted as highly toxic. Public health officials strongly advise against consuming wild mushrooms unless positively identified by experts. Foragers are encouraged to join local mycological societies for hands-on training. Purchasing mushrooms from trusted grocery stores is recommended, and immediate medical attention should be sought if poisoning is suspected, as symptoms can escalate rapidly to severe liver damage.