Hurricane Katrina formed in the Atlantic ocean, near the Bahamas on August 23rd, 2005. It strengthened into a tropical storm by the next day, while moving towards the northeast towards Florida. The storm became a hurricane just hours before making landfall on the east coast of Florida on August 25th. Passing across Florida, the storm entered the Gulf of Mexico and rapidly strengthened in the warmer waters there. It quickly became a Category 3 storm on the Saffir-Simpson Hurricane Scale and continued to intensify. On August 28th, it reached its peak intensity as a Category 5 storm and was at that time the strongest storm ever measured in the Gulf of Mexico. Katrina made landfall in Louisiana on August 29th near Buras-Triumph, Louisiana with sustained winds of 125 mph. The storm moved inland to the north-northeast and maintained its hurricane strength for about 150 miles. Katrina's storm surge caused extreme damage along the Gulf Coast of the U.S., including Louisiana, Mississippi, and Alabama. In the city of New Orleans, Louisiana, breaches of 53 levees submerged most of the city. The aftermath of the storm made Katrina the costliest natural disaster in the history of the United States, with at least 1,836 deaths and $108 billion in damages.