Peel the shrimp, leaving the tails on; reserve the shells. Devein the shrimp, then rinse in a colander; drain and pat dry. Sprinkle with the Creole seasoning.
Heat 2 tablespoons butter in a large skillet over high heat. Add the shrimp shells and half of the scallions and cook until the shells turn pink, 1 to 2 minutes. Add the Worcestershire sauce and 1 1/2 cups water and cook until reduced by half, about 5 minutes. Strain the shrimp broth through a fine-mesh sieve into a bowl; discard the solids.
Melt the remaining 4 tablespoons butter in the skillet over high heat. Add the shrimp and the remaining scallions and cook until the shrimp start to turn pink, about 1 minute. Add the reserved shrimp broth and simmer until cooked through, about 3 more minutes.
Meanwhile, put the corn in a microwave-safe dish and microwave until hot, 2 to 3 minutes. Cut the tomato into chunks. Divide the corn and tomatoes among bowls. Add the shrimp and ladle in the broth. Serve with bread.