As the chart shows, sometimes just a couple of beers are too many. Alcohol also reduces your body's ability to protect against cold water. So within minutes you may not be able to call for help, or swim to safety. Actually, a drunk person whose head is immersed can be confused and swim down to death instead of up to safety. Skin is red and dry.
Skin is red and has blisters.
Skin is brown or charred. Cool the burned area with cool water or ice packs. Do not remove clothes that stick to the skin. Cover the affected area. Give care for shock, get medical attention.