There are a lot of symptoms similar to flu and viruses, such as: fever, chills, pain, dizziness, fatigue and weight loss. Less common symptoms are swollen glands or lymph nodes in the neck and armpits. Also, bruising very easily, severe nosebleeds or severe bleeding from the rectum. If someone has these symptoms or is worried, they should see a doctor and request a blood test.
Max loss of skin, reduced feeling, and almost whitish are the characteristics of a third degree burn
so therefore your answer is third degree burns
The cells would become energy starved leading to ischemia and then infarction. This is if one was unable to do anything else to maintain the homeostasis.
You body however is able to utilize several mechabisms, primarily the use of fats and in extreme cases muscle tissue for the use of energy and ATP production through anaerobic metabolisis.