The Turks and Caicos Islands is an overseas territory of the United Kingdom consisting of two groups of tropical islands in the Caribbean, southeast of the Bahamas, at 21°45N, 71°35W. The thirty islands total 166 sq. mi primarily of low, flat limestone with extensive marshes and mangrove swamps. The weather is usually sunny and relatively dry, but suffers frequent hurricanes. The islands have limited natural fresh water resources; private cisterns collect rainwater for drinking. The primary natural resources are spiny lobster and conch.