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The city was founded in 1849. It was renamed Ciudad Porfirio Díaz in 1888, in homage to President Porfirio Díaz, but it reverted to its original name following the Mexican Revolution.
On 4 April 2004, the Rio Escondido broke its banks and some 80 residents of the Piedras Negra area were killed by or disappeared in the resulting flash floods. See: BBC coverage.