Chicken and Sausage Gumbo

Name: Chicken and Sausage Gumbo
Ingredients: 1 1/2 cups white rice, dry; 2 tablespoons 1/4 cup olive oil, divided; 3 chicken thighs; Kosher salt; freshly ground black pepper; 1 pound andouille sausage, sliced 1/2 inch thick on the diagonal; 1/3 cup all-purpose flour; 1 large yellow onion, chopped; 8 garlic cloves, minced; 2 large carrots, chopped; 4 celery stalks, chopped; 4 cups chicken broth; 4 cups water; 4 thyme sprigs; 1 bay leaf; 2 tablespoons Sriracha; 4 scallions, chopped