Climate change is transforming the global landscape and changing the conditions that determine whether food is safe to eat. As temperatures rise and weather patterns change, the conditions that keep food safe are shifting in ways scientists are only beginning to understand.
Bacteria, such as Salmonella, Vibrio, and Campylobacter thrive in warmer air and water temperatures, increasing the risk of foodborne illnesses. Heavy rainfall and flooding can wash pathogens and chemicals into fields, contaminating crops. Droughts may force farmers to rely on lower-quality water for irrigation. Meanwhile, heat and humidity stress livestock, hasten food spoilage, and strain the “cold chains” that keep perishable foods safe.
Climate pressures also amplify hidden hazards, such as fungal toxins in grains and nuts that flourish under droughts or harmful algal blooms that taint seafood. Together, these threats reveal how food safety and climate resilience are deeply intertwined.
Protecting our food supply in a warming world will require more than vigilance and innovation. Strengthening food safety surveillance, investing in resilient infrastructure, and embracing a One Health approach that links human, animal, and environmental well-being can help ensure safe, nutritious food remains accessible to all.
As the planet heats up, food safety may become one of the most complex challenges in adapting to climate change, one that demands ongoing attention, innovation, and collaboration across sectors.
Learn more from the U.S. Department of Agriculture
— Submitted by Kyndra Shea