Hurricane Katrina was a catastrophic Atlantic hurricane that made landfall in late August 2005, causing widespread devastation along the U.S. Gulf Coast. This evergreen explainer outlines the date and location of the storm’s major impacts, tracks its path from development to landfall, and summarizes verified details on affected regions, storm characteristics, and aftermath. The information below is based on authoritative meteorological and historical sources to serve as a durable reference for core facts.
Key dates and timeline
Hurricane Katrina’s timeline spans from mid-August through early September 2005, with critical developments concentrated in a few days. The system originated from a tropical wave that emerged off the coast of Africa in late July and moved westward across the Atlantic. By late August, conditions allowed rapid intensification. Below is a concise, date-focused overview of the storm’s progression.
| Date or period | Event | Why it matters |
|---|---|---|
| Aug 23, 2005 | Tropical depression formed over the Bahamas | Marked the start of organized cyclonic circulation |
| Aug 25, 2005 | Made first U.S. landfall in southern Florida (Miami-Dade County) | Caused local flooding and wind damage; moved into the Gulf of Mexico |
| Aug 28, 2005 | Rapid intensification to Category 5 over the Gulf of Mexico | Peak winds reached an estimated 175 mph; lowest central pressure recorded at 902 mb |
| Aug 29, 2005 | Second U.S. landfall near Buras-Triumph, Louisiana, and another near the Mississippi border | Brought devastating storm surge, catastrophic levee failures in New Orleans, and extreme wind damage |
| Aug 30, 2005 | Continued severe flooding in New Orleans and along the Gulf Coast | Marked the start of large-scale rescue, displacement, and long recovery |
| Aug 31–Sept 2, 2005 | Ongoing flood response and initial federal/state actions | Focused on search-and-rescue, sheltering displaced people, and assessing damage |
Primary landfall locations
Hurricane Katrina made multiple landfalls, but the most destructive impacts were concentrated in Louisiana and Mississippi. Storm surge and levee breaches in New Orleans produced long-lasting flooding, while coastal Mississippi communities experienced extreme wind damage. The Gulf Coast broadly endured high winds, tornadoes, and widespread infrastructure loss.
Southeast Louisiana (New Orleans and surrounding parishes)
The storm surge pushed water over levees and floodwalls, leading to catastrophic flooding in New Orleans. The city’s aging infrastructure and multiple system failures contributed to prolonged inundation in numerous neighborhoods.
Mississippi Gulf Coast (Harrison, Hancock, and Jackson counties)
Mississippi experienced intense onshore winds and storm-driven waves that damaged or destroyed thousands of structures. Widespread power outages and communication disruptions complicated immediate response efforts.
Other affected states
Portions of Alabama, Tennessee, and the Florida Panhandle also saw significant impacts, including heavy rain, localized flooding, and wind damage. The overall reach of the storm extended across much of the eastern United States.
Storm metrics at a glance
Below are verified attributes of Hurricane Katrina, expressed in standard meteorological and emergency-response terms. These concise metrics support comparisons with other major Gulf Coast events.
| Attribute | Verified detail | Source type |
|---|---|---|
| Storm category at U.S. landfall | Category 3 at Louisiana/Mississippi border; Category 5 in the Gulf | National Hurricane Center (NHC) |
| Maximum sustained winds | 175 mph (280 km/h) at peak | NHC best track |
| Minimum central pressure | 902 mb | NHC best track |
| Duration above major hurricane threshold | Approximately 48 hours over warm Gulf waters | NHC advisories |
| Primary impact region | U.S. Gulf Coast, especially Southeast Louisiana and Mississippi | Federal emergency records |
Geographic context and affected regions
The Gulf Coast’s low elevation, dense population centers, and aging infrastructure amplified Hurricane Katrina’s effects. New Orleans, situated largely below sea level and protected by levees, depended heavily on the reliability of floodwalls and pumps. When those systems failed, large areas of the city remained underwater for weeks. Mississippi’s coastal counties experienced severe overwash and structural damage, while Alabama and Florida saw lesser but still significant impacts.
Why these details matter for long-term reference
Understanding the date and location of Hurricane Katrina clarifies how the storm evolved, where the most severe damage occurred, and which regions were most affected. These facts underpin ongoing discussions about coastal resilience, flood protection, emergency management, and climate-related risk. By anchoring descriptions in verifiable dates and locations, this explainer supports accurate comparisons with other major storms and informed decision-making for preparedness.
Common questions about Hurricane Katrina’s date and location
- When did Hurricane Katrina make landfall in the United States? It made its first U.S. landfall in Florida on Aug 25, 2005, and its most destructive landfalls in Louisiana and Mississippi on Aug 29, 2005.
- Which cities were most affected by Hurricane Katrina? New Orleans, Louisiana, and the Mississippi Gulf Coast, including cities such as Biloxi, Gulfport, and Pascagoula, were among the most affected areas.
- Did Hurricane Katrina ever reach Category 5? Yes, it reached Category 5 intensity over the Gulf of Mexico on Aug 28, 2005, with peak sustained winds of 175 mph.
- Which states experienced impacts from Hurricane Katrina? The Gulf Coast states of Louisiana, Mississippi, Alabama, and Florida, as well as parts of Tennessee and other eastern states, experienced measurable impacts.
Prepare and stay informed
Katrina remains one of the costliest and most studied storms in U.S. history because of its scale and the lessons it revealed about disaster readiness. Reliable information on historical dates and landfall locations helps contextualize current hurricane risks and supports long-term planning for communities in vulnerable regions.