In a Dutch oven, saute the onion, celery and green pepper in oil until tender. Add garlic; saute 1 minute longer. Add the tomatoes, tomato sauce, 1/2 cup water, bacon, parsley, sugar, salt, thyme, curry powder, pepper and cayenne. Bring to a boil. Reduce heat; cover and simmer for 30 minutes. , Combine flour and remaining water until smooth; gradually stir into tomato mixture. Bring to a boil; cook and stir for 1-2 minutes or until thickened. Reduce heat; add shrimp. Simmer, uncovered, for 5 minutes or until shrimp turn pink. Serve with rice.