Grocery bills are on the rise due to drought and extreme weather, as well as temperature changes that affect crop Because of the current California drought, prices of artichokes, celery, broccoli, and cauliflower are expected to rise by 10 percent or more. The Intergovernmental Panel on Climate Change predicts that climate change will contribute to global food cost increases from a low of 3% to a high of 84% by 2050.