Buenos Aires lost by a single vote to Melbourne; for the 1968 Summer Olympics, held in Mexico City; and in 2004, when the games were awarded to Athens. However, Buenos Aires hosted the first Pan American Games (1951) and was also host city to several World Championship events: the 1950 and 1990 Basketball World Championships, the 1982 and 2002 Men's Volleyball World Championships and, most remembered, the 1978 FIFA World Cup, won by Argentina on 25 June 1978, when it defeated the Netherlands at the Estadio Monumental 3–1. In September 2013, the city hosted the 125th IOC Session, Tokyo was elected the
Buenos Aires its geomorphology along with an inadequate drainage network, the city is highly vulnerable to flooding during periods of heavy rainfall. The Executive is held by the Chief of Government (), elected for a four-year term together with a Deputy Chief of Government, who presides over the 60-member Buenos Aires City Legislature. Each member of the Legislature is elected for a four-year term; half of the legislature is renewed every two years. Elections use the D'Hondt method of proportional representation. The Judicial branch is composed of the Supreme Court of Justice (Tribunal Superior de Justicia), the Magistrate's Council (Consejo de la