Climate change is expected to decrease the production of tomatoes, particularly in the United States, China, and Italy, the world's three largest producers. The article highlights California, which grows 90% of the nation's processing tomatoes, as being significantly impacted by rising temperatures. These high temperatures affect the plant's flower development into fruit and increase irrigation challenges amidst water shortages. Additionally, increasing production costs such as water, fuel, and fertilizer are leading to higher retail prices for processed tomato products, with sauce and ketchup prices experiencing notable increases.