In this August 15, 2016 US Coast Guard handout photo, a Coast Guard helicopter flies over flooded areas of Baton Rouge, Louisiana in search of people who may need assistance. As many as 30,000 people have been rescued following unprecedented floods in the southern US state of Louisiana, including a 78-year-old woman who spent a night stranded in a tree, police said late Monday. Residents awoke August 16 to find their homes and businesses still surrounded by muddy water, without clear answers about when the epic flooding that has killed at least seven is expected to recede. / AFP PHOTO / US Coast Guard / PO1 Melissa LEAKE / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO /US COAST GUARD / PO1 MELISSA LEAKE" - NO MARKETING - NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS PO1 MELISSA LEAKE/AFP/Getty Images