had proven reserves of a mere of crude oil and 2.5 trillion cubic feet of natural gas, and mostly used oil for power generation. In 2010, Cuba produced 51,000 barrels of crude oil a day (Kb/d) in 2010 in onshore or shallow near-shore development, "mostly heavy, sour (sulfur-rich) crude that requires advanced refining capacity to process." Offshore exploration in the North Cuba Basin had revealed the possibility of an additional of technically recoverable crude oil, 0.9 billion barrels of natural gas liquids, and 9.8 trillion cubic feet of natural gas. As of 2011, Cuba had six offshore petroleum development projects with foreign oil companies Petrovietnam (Vietnam), Petronas (Malaysia), PDVSA (Venezuela), Sonangol (Angola), ONGC (India), Repsol (Spain), and Statoil (Norway). Sugarcane was historically the most important part of the Cuban economy, and large areas are still dedicated to its cultivation; in 2018, Cuba produced an estimated 1.1–1.3 million tonnes of raw sugar. The importance of the sugar harvest has declined, with tourism, tobacco, nickel, and pharmaceuticals surpassing sugar in economic importance. Extensive irrigation systems are developed in the south of Sancti Spíritus Province. Tobacco, used for some of the world's cigars, is grown especially in the Pinar del Río Province. Climate Most of Cuba has a tropical savanna climate (Aw) according to the Köppen Climate classification, though some areas also have a tropical monsoon climate and a tropical rainforest climate, with a hot semi-arid climate in the Guantánamo Bay area. In most areas, the dry season lasts from November to April and the rainy season from May to October. The climate is tropical, though moderated by trade winds. In general (with local variations), there is a drier season from November to April, and a rainier season from May to October. The average temperature is in January and in July. Cuba lies in the path of hurricanes, and these destructive storms are most common in September and October. Tornadoes are somewhat rare in Cuba; however, on the evening of 27 January 2019, a very rare strong F4 tornado struck the eastern side of Havana, Cuba's capital city. The tornado caused extensive damage, destroying at least 90 homes, killing four people and injuring 195. By 4 February, the death toll had increased to six, with 11 people still in critical condition. Administrative subdivisions Cuba is divided into 15 provinces and one special municipality. Provinces are further subdivided into 168 municipalities. References External links