In the arid southwest of the USA, wild foods are less widely consumed today, but their revitalisation is important to identity and well-being of many Indigenous People. The Karuk people of the Klamath River in California have experienced an almost complete loss of two key traditional wild foods: salmon and acorns, foods which once made up 50% of a traditional Karuk diet , as well as huckleberry . Using regional climate models, Kueppers  showed a major reduction in the range of two species of oak in California that are used in traditional diets. Increasing frequency of severe fires in the western USA threaten a number of traditional wild food resources, especially acorns .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report