States of emergency have already been declared in Louisiana and Mississippi. ABC's Mona Kosar Abdi reports. SUBSCRIBE to ABC NEWS: https://bit.ly/2vZb6yP Watch More on http://abcnews.go.com/ LIKE ABC News on FACEBOOK https://www.facebook.com/abcnews FOLLOW ABC News on TWITTER: https://twitter.com/abc #ABCNews #Weather #TropicalStorm #Sally #GulfCoast