Belford Roxo (Portuguese pronunciation: [ˈbɛwfɔχ ˈχoʃu]) is a city in the State of Rio de Janeiro, Brazil. It is a part of the Metropolitan Region of Rio de Janeiro and was created in 1990. Its population was 495,694 in 2011 and its area is 79 km². Belford Roxo is one of the richest and wealthiest cities in the state, due to its high GDP and relatively low population. Its climate is tropical with an average temperature of 18°C (63°F). Bayer and Lubrizol are the biggest companies in the municipality. It was named after Engineer Raimundo Teixeira Belfort Roxo. While serving as General Construction and Building Inspector for the city of Rio de Janeiro, Engineer Belfort Roxo, together with Engineer Paulo de Frontin, solved the water shortage problems of the area during the summer of 1889.