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|Category 5 major hurricane (SSHWS/NWS)|
|Formed||August 24, 2005|
|Dissipated||August 31, 2005|
|(Extratropical after August 29)|
|Highest winds||1-minute sustained: 175 mph (280 km/h) |
|Lowest pressure||902 mbar (hPa); 26.64 inHg|
|Damage||125 billion (2005 USD)|
(Tied as costliest tropical cyclone on record)
|Part of the 2005 Atlantic hurricane season|
The storm formed over the Bahamas on August 23, where it moved west and hit south Florida as a Category 1 hurricane two days later. Katrina then crossed over Florida and strengthened into a Category 5 hurricane moving west in the Gulf of Mexico.
The leftovers of Katrina then died out over the Great Lakes on August 31.
80% of New Orleans was flooded when the levees protecting the city broke. Most of the people killed by Katrina were thought to have died from drowning. Many of the survivors had swum to higher roofs or tree branches.
- Knabb, Richard D; Rhome, Jamie R; Brown, Daniel P; National Hurricane Center (December 20, 2005). Hurricane Katrina: August 23 – 30, 2005 (PDF) (Tropical Cyclone Report). United States National Oceanic and Atmospheric Administration's National Weather Service. Retrieved January 8, 2016.
- "Hurricane Katrina". Archived from the original on 2012-07-31. Retrieved 2010-11-23.
- Swenson, Dan D.; Marshall, Bob (May 14, 2005). "Flash Flood: Hurricane Katrina's Inundation of New Orleans, August 29, 2005". Times-Picayune. Archived from the original (SWF) on October 17, 2012. Retrieved June 7, 2007.
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- National Hurricane Center's Tropical Cyclone Report on Hurricane Katrina
- National Hurricane Center's archive on Hurricane Katrina
- Hurricane Katrina Rainfall Information from HPC Archived 2015-04-24 at the Wayback Machine
- Hydro-meteorological Prediction Center's "archive on Hurricane Katrina". Archived from the original on 2008-06-13.
- NASA's Hurricane Katrina Archive
- Geology and Hurricane-Protection Strategies in the Greater New Orleans Area Louisiana Geological Survey publication on Hurricane Katrina