In a 2-quart glass casserole dish, combine chicken, bell peppers, and onions. Cover and microwave on high for five minutes, or until chicken is no longer pink, stirring once during cooking time. Stir in soup, chili powder, salt, and worcestershire sauce. Cover and microwave on high for five minutes, or until hot. Wrap and stack tortillas in damp paper towels. Microwave on high for one minute, or until warm. Spoon one-fourth cup chicken mixture onto each tortilla. Fold in sides and roll up to make burritos.