Raw chopped meats, like hamburger, spoil quickly. Pork, fish, and poultry also spoil quickly. Dispose of them if they have been in the refrigerator without power for 12 hours or more, or cook them immediately if the temperature has dropped below 40 degrees Fahrenheit. Hard cheese will probably do fairly well, but other cheeses, such as cream cheese, cheese spreads and cottage cheese, spoil quickly. It just can't be emphasized often enough.
Milk spoils very quickly without refrigeration, especially in summer temperatures.
Sour milk may be used in baking, but spoiled milk should be discarded. Once creamed foods, custard, chopped meats, poultry and seafood have warmed to room temperatures, they spoil quickly. Since there may be no offensive odor or taste, they should be disposed of without being sampled first. Food safety issues exist at any season of the year and should never be taken lightly. I recommend that you bookmark it on your computer and check it often.