French Polynesia is a French overseas collectivity comprising 118 islands and atolls spread across the South Pacific. Crime rates are low, particularly on the outer islands, though petty theft can occur in Papeete on Tahiti. The territory is subject to cyclone season from November to April, and some low-lying atolls are vulnerable to storm surges. Medical care at the Centre Hospitalier de la Polynésie Française in Papeete is of a good standard, but facilities on remote islands are very limited; travellers venturing to outer islands should carry comprehensive medical evacuation insurance. Strong ocean currents and marine hazards require caution when swimming or diving.