Parnaíba (Portuguese: [paʁnaˈibɐ]) is a city in the Brazilian state of Piauí. Having a population of over 170,000 inhabitants, it is the second most populous city in the state, after the capital Teresina. It is one of the four coastal municipalities in Piauí (besides Ilha Grande, Luís Correia and Cajueiro da Praia).
As well as the natural environment, Parnaíba has historical value for Piauí, presenting mainly near Porto das Barcas several historic buildings that reflect the importance of Parnaíba, coming at that time to be more important than the former capital Oeiras and taking up same references in Europe.
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Parnaíba is located at Parnaíba River basin and is cut by that which divides into several arms forming the famous Delta of the only offshore of the Americas and the third largest in the world, second only to the Nile in Egypt and Mekong in Southeast Asia. One of these arms is the "river" Igaraçu where the port is located from barcase. Most of the city is on the right bank of the Igaraçu since the rest is in Big Island of Santa Isabel, now in Parnaíba River delta. The only beach of the city is the Pedra do Sal, ideal for surfing, kite surfing and wind surfing. Another source is the city Portinho Lagoon, one of the most famous tourist attractions, that due to the advance of the dunes may disappear. The city is located on land Cenozoic Quaternary and has altitude of about 5 meters in areas of the urban center which is away from the coast. It lies on the coastal plain and the topography is fairly regular. Predominate in the creeks and mangrove vegetation on river banks and scrub, coastal and bush of coca crops in the rest of the territory.Predominates in the region and the climate megathermal semi-humid tropical, with high rate of rainfall due to the mass action Equatorial Atlantic during the months from January to June.
Second city in the state of Piaui, Parnaíba distinguished by beautiful landscape, marked by Carnaubais, and the relatively moderate commercial and industrial activity. Parnaíba is located on the right bank of the "river" Igaraçu, which actually is the southernmost arm of the Parnaíba River delta. Located near the coast, altitude 13m, lies 366 km from Teresina, the state capital of Piauí. The main economic activity is the export of Parnaíba carnauba wax, babassu oil, coconut oil, sheet jaborandi, cashew nuts, cotton and leather. The municipality also has industries of food and perfumery. For example, Vegeflora, Delta Cooperative Milk Long, Cobrasil, Q-Odor recycling Tannery Romao, Q-Odor and PVP SA. Parnaíba was honored with a zone processamente exports (ZPE). An area reserved for companies wishing to settle in the city produce for Brazil and the world. The Capital of Lower Parnaíba also has been increasing in agribusiness with production of camaraoes, fruit and milk. Tourism is gaining strength, and the city center of "rota das emoções" which is a tourist route between Lencois Maranhão, Parnaíba Delta Jericoacoara. In south of the city tourists can visit the National Park Ubajara (CE) and Sete Cidades (PI). There are several projects of resorts and hotels to be built in the city and region. In 2009, Parnaíba was considered the most dynamic city in the state, 5th in the Northeast and 32 of Brazil. It was the fastest growing city of Brazil in 2011, with a recorded growth rate of 229%. The city has invested R$34 million in 2011 from R$10.3 million that were applied in 2010.
City also won a large irrigated perimeter, which has attracted people from different parts of Brazil to produce.
Two shopping centers, cinemas and bowling, and a theater are being erected in the city. Besides an olympic village with tennis courts, basketbal, biking and swimming pools is being built.