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- Hurricane Katrina strikes the coast of Louisiana with heavy rain and wind, forcing the evacuation of the city of New Orleans.
- Campaigning for the 2005 general election in Japan officially begins.
- John Brogden, New South Wales Opposition Leader for the Liberal Party of Australia, resigns after reportedly making racist remarks as well as unwanted sexual advances toward several female journalists.
- Members of the National Assembly of Iraq sign the text of the proposed constitution. A referendum will be held on October 15, with leaders of the Sunni Arab community already calling for a "no" vote.
- The 2005 European floods, which killed 42 people, start to subside and those evacuated return to their homes.