The continued downpours and damaged passageways disrupted relief efforts, as did the topography of affected areas. The Red Cross and the federal government contributed fifteen vehicles, including three ambulances, to assist in traveling to isolated areas, while the United Nations Office on Drugs and Crime (UNODC) sent a joint team of forensic officers and specialized rescue units with trained dogs. The Connaught Hospital mortuary in Freetown was overwhelmed by nearly 300 bodies in the first day alone, forcing workers to lay victims on floors and outside the building to be identified. Due to the lack of manpower and threat of disease, bodies were buried in mass graves on August 15 at two sites in Waterloo. Sierra Leone's Office for National Security (ONS) advised survivors to evacuate flood-prone areas. Additional evacuations took place when aerial images of a hillside adjacent to Sugar Loaf revealed the threat of another mudslide which could impact a much wider area. Response teams were deployed to two voluntary relocation centers, the Old Skool compound in Hill Station and Juba barracks in Lumley, where workers distributed sanitation and medical supplies. By August 16, workers in Regent and Kaningo began constructing emergency latrines and four 10,000-liter water harvesting systems. Unsanitary waters raised fears of cholera; however, workers provided storage tanks, purification tablets, and instructional courses on hygiene to help prevent an outbreak of waterborne diseases. The government of Sierra Leone also launched its first ever cholera vaccination campaign on September 15, targeting over 500,000 citizens in the Western Area. After the disaster, affected areas faced water shortages; as a result, UNICEF distributed 26,000 liters of drinking water each day. President Ernest Bai Koroma addressed Sierra Leone in a national broadcast August 15, declaring a state of emergency and announcing the establishment of a relief center in Regent. He urged the nation, still recovering from the aftermath of the Ebola outbreak, to remain unified: "Our nation has once again been gripped by grief. Many of our compatriots have lost their lives, many more have been gravely injured and billions of Leones' worth of property destroyed in the flooding and landslides that swept across some parts of our city". He also addressed the coordination of registries in Freetown that provided aid for residents left without shelter. On August 15, the president declared seven days of national mourning, which would begin immediately. Koroma made an appeal to the international community for relief. Already in the country, numerous international organisations acted immediately, providing basic supplies and services – from food and shelter to personal counselling and mobile phones.