Hurricane Katrina struck New Orleans on August 29, 2005. The city's levee system failed, flooding 80% of the city. At least 1,833 people died in the hurricane and subsequent floods, making it the deadliest US hurricane since 1928. The total property damage was estimated at $108bn.
In this gallery, we look back at the devastation caused by Hurricane Katrina.
A satellite image shows Hurricane Katrina at 1515 GMT (11:15 am EDT) on August 29, 2005, hours after making landfall on the Louisiana coast. At least a million people had fled the area ahead of the powerful storm, which weakened and was downgraded to a Category 4 storm as it neared land, with winds of 155 mph (248 kph) Reuters August 29, 2005: People walk down a flooded street after Hurricane Katrina hit New Orleans, Louisiana Getty August 29, 2005: A man looks out of one of hundreds of windows broken by Hurricane Katrina at the Hyatt Hotel in New Orleans Getty August 29, 2005: A dog waits to be rescued from the floodwaters surrounding a house in New Orleans Getty August 30, 2005: An aerial view shows flood waters covering streets in New Orleans. It was estimated that 80% of New Orleans was underwater as levees began to break and leak around Lake Ponchartrain AFP August 30, 2005: A woman is airlifted to safety by a Coast Guard helicopter in the aftermath of Hurricane Katrina in New Orleans AFP August 30, 2005: The damaged roof of the Louisiana Superdome in New Orleans Getty August 30, 2005: An aerial photograph shows a levee giving way to high water in New Orleans. Floodwaters engulfed much of New Orleans after the historic city's defences were breached by Hurricane Katrina Reuters August 30, 2005: A man paddles on a floating door along a flooded street in New Orleans Reuters August 30, 2005: People stand stranded on a roof surrounded by high flood waters in New Orleans AFP August 30, 2005 : An aerial view of a flooded neighbourhood east of downtown New Orleans Getty August 31, 2005: Two men paddle in high water near the bridge crossing the Industrial Canal to the Lower Ninth Ward in New Orleans Getty August 31, 2005: A submerged police car is seen in the east of New Orleans after Hurricane Katrina devastated the area Reuters August 31, 2005: Prison inmates are held at the end of a sunken highway in New Orleans, Louisiana Reuters August 31, 2005: Earl Dunbar of the Louisiana State Capitol Police carries a five-day-old baby an evacuee brought to the Superdome for treatment. The mother said she had been trapped in her home after Hurricane Katrina hit Reuters September 1, 2005: Dorothy Divic, 89, is surrounded by onlookers trying to keep her alive on a street outside the New Orleans Convention Cenre. Several people among the thousands of stranded evacuees from Hurricane Katrina died while waiting outside the building, with no sign of help on the way Reuters September 1, 2005: A body floats in floodwaters in New Orleans AFP September 2, 2005: An aerial view of homes surrounded by floodwaters from Hurricane Katrina as fires burn near downtown New Orleans Reuters September 2, 2005: A shaft of sunlight comes in through a hole in the damaged roof of the New Orleans Superdome after it was emptied of thousands of Hurricane Katrina survivors Reuters September 2, 2005: Thousands of refugees fill the floor of the Astrodome in Houston, Texas Reuters September 4, 2005: A man clings to the top of a vehicle before being rescued by the US Coast Guard from the flooded streets of New Orleans Reuters September 6, 2005: A man stands in flood waters as fire burns down a home in the seventh ward of New Orleans in the aftermath of Hurricane Katrina Reuters September 10, 2005: A helicopter drops sandbags to help repair the London Street canal levee in New Orleans Reuters September 13, 2005: Hurricane Katrina holdout Joshua Creek sits on the porch of his house in front of the Memorial Medical Centre of New Orleans Reuters September 16, 2005: A Hurricane Katrina holdout walks home in the French Quarter neighbourhood of New Orleans Reuters