Often described as an archipelago of 33 islands, extensive land reclamation projects have changed this; by August 2008 the number of islands and island groups had increased to 84. Bahrain does not share a land boundary with another country but does have a  coastline. The country also claims a further  of territorial sea and a  contiguous zone. Bahrain's largest islands are Bahrain Island, the Hawar Islands, Muharraq Island, Umm an Nasan, and Sitra. Bahrain has mild winters and very hot, humid summers. The country's natural resources include large quantities of oil and natural gas as well as fish in the offshore waters. Arable land constitutes only 2.82% of the total area.