The north of Belize consists mostly of flat, swampy coastal plains, in places heavily forested. The flora is highly diverse considering the small geographical area. The south contains the low mountain range of the Maya Mountains. The highest point in Belize is Doyle's Delight at 3,688 ft. (1,124 m.).[5] The Caribbean coast is lined with a coral reef and some 450 islets and islands known locally as cayes (pronounced "keys"), forming the approximately 200 mile (322 km) long Belize Barrier Reef, the longest in the Western Hemisphere and the second longest in the world after the Great Barrier Reef. Three of the four coral atolls in the Western Hemisphere are also located off the coast of Belize. Belize is also the only Central American country without a coast on the Pacific Ocean. The climate is tropical and generally very hot and humid. The rainy season lasts from June to November and hurricanes and floods are frequent natural hazards. According to the most recent vegetation surveys, about sixty percent (60%) of Belize is forested, with only about twenty percent (20%) of the country's land subject to human uses (such as agricultural land and human settlements). Savanna, scrubland and wetland constitute extensive parts of the land. As a result, Belize's biodiversity is rich, both marine and terrestrial, with a host of flora and fauna. About thirty-seven percent (37%) of Belize's land territory falls under some form of official protected status.