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Santiago Metropolitan Region

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The Santiago Metropolitan Region is a vital administrative division of Chile. It is one of the country's 16 first-order divisions. This region is unique because it is the only landlocked region in Chile. This means it does not have a coastline. It sits within the Intermediate Depression, which is a large valley. This valley is located between the Chilean Coast Range and the Andes Mountains. The region serves as the nation's most important center for business and government. It contains the capital city, Santiago, and the Arturo Merino Benítez International Airport.

The geography of the region is defined by its diverse landforms. Most of the area consists of a level, fertile prairie known as la Depresión intermedia. This terrain is characterized by low elevations relative to sea level. Several prominent hills rise from the flat landscape like islands. These are known as island hills, and examples include Santa Lucía, Blanco, and Renca. In the city, Cerro San Cristóbal dominates the skyline. To the east, the suburbs climb the foothills of the Andes. One of the highest peaks in South America, the Tupungato stratovolcano, stands on the border with Argentina.

Water systems play a major role in the region's landscape. The dominant drainage basin feeds into the Maipo River. This river system relies on several main tributaries. These include the Mapocho, Yeso, and Colorado rivers. The climate in the region is described as a temperate Mediterranean cold climate. This is also referred to as a continental climate. The Cordillera de la Costa acts as a climate screen. This mountain range reduces the influence of the ocean on the valley. Consequently, the region receives less rain than coastal cities like Valparaíso. The annual median precipitation is approximately 367 mm.

Seasonal changes bring distinct weather patterns to the Metropolitan Region. Summers are typically characterized by hot and dry conditions. Winters are cold and often feature frequent frosts. During these cold periods, temperatures can drop below 0°C. Most precipitation occurs during the winter months. In areas higher than 900 meters above sea level, this precipitation often falls as snow. In very cold years, snow can even fall over the city of Santiago itself. The annual median temperature is 17°C. In urban areas, the median high is 25°C and the median low is 9°C. Rural areas often experience even colder temperatures during July and August.

The history of the region shows a long period of administrative change. European influence began in 1542, shortly after the founding of Santiago. At that time, a group called the Santiago cabildo supervised the entire territory. As new cities like La Serena and Concepción were established, the cabildo's reach decreased. On August 30, 1826, the area was divided into eight provinces. The Santiago Province was one of these original eight. However, the specific designation of the Metropolitan Region did not occur until 1980. Today, the region is divided into six provinces and 52 communes. Since 2021, a governor is elected by popular vote to lead the region.

Economically, the region is a powerhouse for the Chilean nation. It is the most developed subdivision in all of South America. The region has a very high Human Development Index (HDI) of 0.908. The capital city, Santiago, produces 41.5% of Chile's gross domestic product. Key industries include manufacturing, retail, financial services, and general services. The region is also home to significant mineral resources. Copper ore deposits are found in the mountainous parts of the region. The Los Bronces mine sits in the high Andes near the Valparaíso Region. Another site, the Catedral prospect, contains unexploited copper ore near the O'Higgins Region. The Lo Aguirre mine was also located here near the Coastal Cordillera until it closed in 2000.

Demographics show that the region is highly urbanized. As of the 2024 census, the population reached 7,400,741 people. About 96.2% of these residents live in urban areas, while only 3.8% live in rural areas. The population is composed of 48.4% males and 51.6% females. Younger people under age 15 make up 17.3% of the population. Those aged 65 and older account for 13.2%. Nature also exists within the province, including the endangered Chilean Wine Palm, or Jubaea chilensis. This iconic tree once had a much larger range before human population growth reduced its habitat. Many historic wineries also remain in the valley, preserving cellars built in the 19th century.

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