Horn sites open ; some oil detected on beaches . Health officials have issued an advisory against swimming in Petit Bois island waters . Several tar balls were spotted in the area over the weekend . ` Fort Morgan and Perdido Key , Perdido Key , waters open the weekend for swimming and fishing .
Horn sites open ; some oil detected on beaches . Health officials have issued an advisory against swimming in Petit Bois island waters . Fort Morgan and Perdido Key , Perdido Key , waters open the weekend for swimming and fishing .