DENPASAR/JAKARTA, Indonesia (Reuters) -Two people were still missing on Indonesia's resort island of Bali, officials said on Friday, as waters began receding after flooding killed at least 16 people this week, most of them swept away when rivers burst their banks. Torrential rains on Tuesday and Wednesday caused the fast-rising floods in Denpasar and six of Bali's eight regions, blocking major roads and access to the island's international airport. Rapid development on the island did not take into account the need for sufficient drainage infrastructure, said I Nyoman Gede Maha Putra, an architecture and planning expert at the Warmadewa University in Denpasar.