California authorities are warning people not to eat foraged mushrooms for the time being after nearly two dozen people were sickened — including one fatally — by a highly poisonous mushroom known as the death cap.

The California Department of Public Health (CDPH) said in its advisory that there have been 21 confirmed cases of toxic mushroom poisoning — which it says is "likely" from consumption of death caps — between mid-November and last Friday.

Toxins from the mushrooms killed one adult and caused severe liver damage in kids and other adults. Several patients required intensive care, "with at least one individual potentially needing a liver transplant," health officials added.

Officials said there have been "significant clusters" of cases reported in the Monterey and San Francis

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