Experts say they may have the answer for an “unprecedented” rise in wild mushroom poisonings that have been observed across California. Since November 2025 there have been 47 cases of severe poisonings and four deaths reported statewide, according to the Napa County Public Health Officer. “Recent rains have contributed to the resurgence of poisonous wild mushrooms in California, including in Napa,” said Dr Christine Wu. “Poisonous mushrooms can look and taste similar to safe mushrooms, and even experienced mushroom hunters have been affected by this outbreak.” Wu’s warning comes after three adults were hospitalized over the weekend after eating poisonous wild mushrooms foraged in the Deer Park area, in Napa County. But she notes poisonous mushrooms can be found anywhere. The two fungi types causing the illness are the Death Cap and Western Destroying Angel mushrooms, according to the California Department of Public Health.…