PM Update: Scattered showers and thunderstorms through the early evening. Much cooler on Monday. You may have to dodge some raindrops through about 8 tonight. A cold front moves through tomorrow morning and ushers in much more seasonable weather.
Only cook live crabs, because they deteriorate very quickly after they have expired. You can simply throw the crabs in a pot of boiling water to cook them. Depending on the size of the crabs, it will take between 6 and 10 minutes for them to cook thoroughly. If the crab is alive when you start, the amount of cooking time has very little to do with safety  it s more a question of whether the meat is underdone, overdone, or cooked just right.
King crab legs are the largest of the crab legs and in some cases can be 2 inches in diameter. When you cook larger crab legs, be sure to cook them more thoroughly. A large batch of king crab legs will take between 8 to 10 minutes to completely cook through. Cook king crab legs in a large pot with enough water to completely submerge the crab legs.