According to the USDA's official u003ca href=u0022https://www.fsis.usda.gov/wps/portal/fsis/topics/food-safety-education/get-answers/food-safety-fact-sheets/safe-food-handling/safe-minimum-internal-temperature-chart/ct_indexu0022u003ewebsiteu003c/au003e, seafood is cooked through and safe to eat when the internal temperature reaches 145 degrees F (62.7 degrees C). Crab is already cooked when sold as lump crab meat or tinned crab meat, so you shouldn't have any issues when cooking these crab cakes.