Heat oil in a large nonstick skillet over medium-high heat. Add onion and garlic; sauté 4 minutes. Add tomato, pepper, and celery; sauté 6 minutes.
Stir in water, rice, and salt, and bring to a boil. Cover, reduce heat, and simmer for 15 minutes.
Add shrimp; cook 4 minutes or until shrimp are done.