North American food production is increasingly affected by climate change , with immediate impacts on the food and nutritional security of Indigenous Peoples. Climate change and extreme weather events have impacted North American agroecosystems , with crop-specific effects that vary in direction and magnitude by event and location. Climate change has generally reduced agricultural productivity by 12.5% since 1961, with progressively greater losses moving south from Canada to Mexico and in drought-prone rain-fed systems  while favourable conditions increased yields of maize, soybeans in regions like the USA Great Plains. Loss of availability and access to marine and terrestrial sources of protein has impaired food security and nutrition of subsistence-dependent Indigenous Peoples across North America . Climate change has impacted aquaculture  and induced rapid redistribution of species , and population declines of multiple key fisheries . 
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report