Several Central Illinoisans are headed to Florida to help prepare for Tropical Storm Isaac.  The American Red Cross of the Heartland is sending three volunteers from Bloomington, Normal.  Red Cross spokesman Scott Vogel says Mike McKnight will help with facilities management in Tampa.  He'll be looking at the need for different facilities, making sure the Red Cross has the type of structures they need to not only handle people who are being displaced from their homes, but also warehousing for equipment and food.  Norma Pilkington will work as a shelter supervisor and Vickie Eckhardt will be helping out in the shelter.  Vogel says there are other Central Illinois volunteers who are on-call just in case they need to go and assist as well.  He says he's glad to see such a strong representation of Central Illinoisans who are willing to help in a time of need.  The National Weather Service projects Tropical Storm Isaac could make landfall in Florida on Monday morning.