The Federal District, founded April 21, 1960, is one of 27 federative units of Brazil. Located in the Central Plateau of the Brazilian Highlands, the Federal District is divided into 31 administrative regions, and contains the Brazilian capital city, Brasília. The capital — the seat of the three branches of the federal government of Brazil (legislative, executive and the judiciary) — is the main attraction of this dry area, whose climate has only two seasons. During the dry season (winter), the humidity can reach critical levels, mainly in the peak hours of the hottest days. The artificial Paranoá Lake, with almost and of water, was built to minimize the severe dry, climatic conditions of winter in the cerrado vegetation.
Rio de Janeiro
The civil government was transferred from Rio de Janeiro's Catete Palace to Brasília on April 21, 1960, which was then split off from Goiás (major part) and Minas Gerais. After the transfer, the municipality of Rio de Janeiro became the Guanabara State (Estado da Guanabara), which existed from 1960 until 1975 when Guanabara State and Rio de Janeiro State (Estado do Rio de Janeiro) merged and assumed the name Rio de Janeiro State, having as capital the city of Rio de Janeiro.
Originally, the majority of the population consisted of "Candango" workers from other states who built the capital and federal government employees who were transferred to the new capital. The capital is a thoroughly planned city with designated areas for residence, businesses, schools, churches, etc. No streets have names, but are identified instead by letters and numbers arranged in a geographical system according to blocs (Q-Quadras) and sectors (S-Setor e.g.: SB - Setor Bancario or "Bank Section"). Originally built for up to one million inhabitants, the city now has more than twice that number. Due to its complex organization, the growth of the city itself has been slow. This has forced many to settle in neighboring cities around Brasília, which now house a significant percentage of the whole population.