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Tag: Gulf Coast of the United States

  • A look at the meteorology behind Hurricane Katrina 20 years later

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    What started as Tropical Depression Twelve on Aug. 23, 2005, over the Greater Antilles would soon become one of the deadliest hurricanes on record to hit the United States.  

    Traveling through southeastern Florida, up into the Gulf Coast and eventually disintegrating over the Ohio Valley, nothing could prepare those in Katrina’s path for what they are still reeling from to this day, 20 years later

    A look at the path of Hurricane Katrina. 

    CBS News


    How Hurricane Katrina formed 

    A tropical wave moved off the coast of Africa into the Atlantic Ocean on Aug. 11, 2005, on a westward path. As it crossed the Central Atlantic and eventually reached the Leeward Islands, on Aug. 19 it combined with the remnants of what was once Tropical Depression Ten.   

    The tropical wave dominated the interaction and began to form a large area of organized thunderstorms over parts of Puerto Rico.  

    At 2 p.m. ET on Aug. 23, Tropical Depression Twelve formed as a distinct center of circulation and was strengthening about 175 nautical miles southeast of Nassau, Bahamas.  

    As hurricane hunters investigated the storm system, Katrina received its name when it strengthened into a tropical storm with maximum sustained winds of 40 mph on Aug. 24, 2005, at 8 a.m. ET, about 65 nautical miles east-southeast of Nassau.   

    Hurricane Katrina

    The path of Hurricane Katrina before it made its first landfall in the U.S. on Aug. 25, 2025. 

    NOAA


    Tropical Storm Katrina continued on a west-northwestward path toward Florida, as residents had minimal time to prepare. Katrina became a hurricane at 5 p.m. ET on Aug. 25, 2005, with maximum sustained winds of 75 mph. A Category 1 hurricane has a sustained wind speed of 74-95 mph.

    Katrina became a hurricane less than 2 hours before it made landfall in Southern Florida.  

    Katrina made landfall in the U.S. three times 

    Also known as “the forgotten landfall,” the first of three landfalls was made on Aug. 25, 2005, at 6:30 p.m. ET in Hollywood, Florida, as a Category 1 hurricane with maximum sustained winds of 80 mph. It spent about 6 hours overnight traveling through the state of Florida, mostly impacting the Florida Everglades. As it had no fuel source over land, it quickly weakened back down to tropical storm status overnight with 69 mph winds. 

    As Katrina continued on its westward path and eventually reached the Gulf, it quickly regained strength. It became a Category 1 hurricane once again at 2 a.m. ET on Aug. 26, 2005, over the Eastern Gulf. Not only did it start to strengthen, but it also underwent rapid intensification twice in the next 48 hours. 

    Hurricane Katrina

    The path Hurricane Katrina took as it made its second landfall in Louisiana on Aug. 29, 2025. 

    NOAA


    Rapid intensification occurs when the maximum sustained winds of a tropical cyclone increase by at least 35 mph in a 24-hour period. Katrina jumped from 75 mph to 109 mph from Aug. 26 to the morning of Aug. 27. It underwent rapid intensification a second time, from Aug. 27 to Aug. 28, when it jumped from 115 mph to 167 mph.  

    Katrina reached its peak intensity with maximum sustained winds of 173 mph at 2 p.m. ET on Aug. 28, about 170 nautical miles southeast of the mouth of the Mississippi River.  

    Hurricane Katrina

    In this satellite image from the NOAA, Hurricane Katrina is seen in the Gulf of Mexico on Aug. 28, 2005. 

    NOAA via Getty Images


    Katrina experienced an Eyewall Replacement Cycle

    Katrina was so intense in strength that it also experienced what is known as an Eyewall Replacement Cycle. This occurs when the eyewall, which is where the strongest winds of a tropical system are, reaches its maximum capacity, so much so that another eyewall forms on the outside of it. This cuts off fuel to the original eyewall and eventually diminishes it, resulting in the system weakening, as well. This occurred with Katrina on Aug. 28, leading to the rapid weakening prior to its second landfall on the Gulf Coast. 

    That second landfall took place on Aug. 29, 2005, at 7:10 a.m. ET in Buras, Louisiana, as a Category 3 hurricane with maximum sustained winds of 127 mph. It quickly made a technical third landfall on the Louisiana-Mississippi border at 10:45 a.m. ET, as a slightly weaker Category 3 hurricane with maximum sustained winds of 121 mph. 

    Hurricane Katrina

    The three landfalls made by Hurricane Katrina. August 2005. 

    CBS News


    If a storm is a Category 3, 4 or 5, it is deemed a “major” hurricane due to the potential for “significant loss of life and damage,” the National Hurricane Center says.

    As expected, the storm lost its fuel from the warm waters of the Gulf as it moved over land. Katrina rapidly weakened to a Category 1 hurricane by 2 p.m. ET and a tropical storm only 6 hours later, at midnight on Aug. 30, 2005. It became a tropical depression over the Tennessee Valley by 8 a.m. ET on Aug. 30, but fully transitioned into a remnant low-pressure system by 8 p.m. ET that day.  

    Some facts and figures:

    • Numerous observations of high storm surge were investigated by the Federal Emergency Management Agency, which determined that upwards of 24-to-28-foot storm surge was observed along the Mississippi coast.  

    • Storm surge was also observed to cross over Interstate 10 in several locations, with the highest east of Katrina’s eye path.

    • Even after the initial threat of Katrina had passed, the intensity of the storm surge put a strain on the New Orleans levee system. Levees are either manmade or natural embankments that help control the flow of water to protect land and communities. Storm surge overtopped and broke through levees and floodwalls, which caused excessive flooding in the New Orleans area.  

    • About 80% of New Orleans flooded, with some depths reaching up to 20 feet within the first 24 hours of Katrina’s landfall.  

    • Katrina also produced a total of 43 tornadoes in the Florida Keys, Georgia, Alabama and Mississippi.  

    • 1,392 total fatalities were attributable to Katrina, according to a 2023 report from the National Hurricane Center. And according to the hurricane center, Louisiana reported that people over the age of 60 made up the majority of Katrina deaths in that state.  

    • Katrina contributed to about $125 billion in damage in 2005, according to the hurricane center — the costliest in U.S. history. Adjusting for inflation, that would be about $186.3 billion in 2022 dollars. 

    • On Aug. 28, 2005, at 2 p.m. ET, Katrina’s measured barometric pressure fell to 902 millibars, which was the fourth-lowest on record in the Atlantic Ocean. However, it has since dropped to sixth-lowest, behind Hurricane Rita and Hurricane Wilma, both of which occurred later in 2005.  

    • When Katrina made landfall in Buras, Louisiana, the measured pressure was at 920 millibars, which is the lowest on record in the Atlantic Ocean for a hurricane at an intensity of 127 mph. 

    • The strongest sustained winds measured at a fixed location on land from Katrina were at 4:20 a.m. ET on Aug. 29, 2005, at 88 mph.  

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  • 20 years after Hurricane Katrina, a barrier island in Alabama is disappearing

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    Hurricane Katrina was a terrifying experience for more than a million people affected across the Gulf Coast region. Nearly 1,400 people died, most of them in New Orleans — and 20 years later, some communities are still struggling to recover.

    The National Hurricane Center says the costliest hurricane in U.S. history — more than $201 billion based on the 2024 Consumer Price Index adjusted cost — caused widespread flood damage across Louisiana, Mississippi, and Alabama. 

    On Dauphin Island, Alabama, the barrier island town’s west end beach was severed during Katrina. A 1.5 mile-wide gap was left behind. More than 300 homes were destroyed on the island, and for many of those homes, the land on which they stood was permanently washed away.

    Since Hurricane Katrina made landfall on Aug. 29, 2005, Dauphin Island has been shrinking and moving even more from additional storms and sea level rise. The island is now facing a dire existential crisis. 

    Images of Dauphin Island from 2004, 2005 and 2008 shows the shrinking barrier island in Alabama.

    Mayor Jeff Collier never imagined storms, big or small, would batter the island so hard. Some residents are still paying property taxes on lots that are now under Gulf waters — vacationers frequently swimming over top of them. 

    “This area here is where most of those underwater lots are,” Collier said as he took a CBS News crew on a tour of Dauphin Island. “There are probably 50 lots in this stretch of the island.”

    Some residents’ homes are sitting in perilous positions, their pilings now situated well into the Gulf. The homes are still technically livable — vacationers even renting them out this summer — but Collier says it’s only a matter of time before another storm wipes out more.

    Over the last 20 years, the town has rebuilt some of its white sand beaches. Last year, on the island’s east end, the town was able to use Deepwater Horizon Oil Spill settlement money on a beach erosion project to push Gulf waters back about 350 to 400 feet, according to the mayor.

    But on a barrier island like Dauphin, constant maintenance is critical. Jillian Fairbanks visits the island frequently and has seen the erosion first-hand over time.

    “Just about a year later, I can already tell that the sand has eroded, I’d say 30 meters or so at least,” Fairbanks said. “It was still a shock to see that happen already in one year.”

    Her parents have lived there for 13 years. She says they’ve advocated for beach restoration projects for years to protect the town.

    “It’s more calm, laid back, peaceful,” Fairbanks said. “I’ll come here as long as it’s here.”

    katrina-dauph-setd1-lg-0.jpg

    Images show how Hurricane Katrina eroded the beach on Dauphin Island.

    USGS


    It will take millions of dollars from several grant sources to preserve what’s left, and Collier says that’s the biggest challenge.

    Dauphin Island is planning to use more oil spill settlement money to help pay for another beach restoration project for the island’s west end, which will cost $60 million. The mayor is still pursuing additional funding sources to make the project possible.

    He’s also utilizing help from an Environmental Protection Agency grant to upgrade the town’s stormwater runoff systems to help mitigate street flooding during storms, even low-grade ones. As of April, Collier says the town had already spent more than $420,000 on the $1.2 million project.

    Because these projects need continuous upkeep and oversight, Collier sought help from a special FEMA program. He said a grant for a $250,000 project would help the town hire an engineering and design firm to create a specialized disaster mitigation plan.

    The Building Resilient Infrastructure and Communities grant, or BRIC, includes investments in state planning and capacity building, such as $2 million in Alabama to support statewide building code implementation costs, according to Derrick Hiebert, who oversaw the program.

    He served as assistant administrator for the Hazard Mitigation Directorate at FEMA for the last two years. 

    “We selected over 1,900 projects. FEMA selected over 1,900 projects worth nearly $5 billion,” Hiebert said. “This included $150 million over three grants to improve three canal basins in South Florida that are plagued by flooding.”

    lightning-west-end.jpg

    The West End of Dauphin Island.

    He added the BRIC program was also funding a massive flooding mitigation project in Washington state.

    “The North Shore Levy — $80 million in federal funding to a community that has suffered significant economic disruption in recent years,” he said. “It was going to protect 3,100 homes and businesses, removing them from the FEMA-designated floodplain and reducing risk in that community.”

    Hiebert said it also helped some other western communities with wildfire mitigation efforts and was first established with bipartisan support. 

    “It was established during the first Trump administration, after the passage of the Disaster Recovery Reform Act, and it helped solve several long-standing challenges with local governments,” Hiebert said. 

    Against Hiebert’s wishes, the Trump administration’s FEMA canceled the program in April, calling it “wasteful and ineffective.” In another announcement, the agency said BRIC resulted in a “lack of concrete results.”

    Hiebert said he supports any administration’s ability to “evolve and adapt” and he doesn’t see changes to FEMA as a bad thing, but he believes the cancellation of such projects is “devastating” to the places that need them. 

    “If the administration wants to change FEMA, or change the BRIC program to something different that looks a little different, that’s the prerogative. That’s good,” he said. “These communities that were expecting these funds, that were counting on these funds for these real large-scale infrastructure projects, what hurts me the most is to know that some of them, or many of them, may not get built, and that these risks … don’t have another place to turn to address these risks.”

    west-end-heron-bob.jpg

    A heron walks along the West End of Dauphin Island.

    Hiebert said he quit his position in June, two months after the program was scrapped. A group of 20 states last month sued the Trump administration, seeking to block what they say was an illegal termination of BRIC. 

    In response to the lawsuit, a FEMA spokesperson told CBS News that resiliency is a priority for the Department of Homeland Security, which oversees FEMA. “But over the last four years the Biden Administration used the BRIC program as a piggy bank for its green new deal agenda,” the spokesperson said.

    FEMA data shows the cut impacted nearly 700 projects at a cost of $3.6 billion. A CBS News investigation found that the recent BRIC funding cuts have disproportionately affected counties that supported Mr. Trump in the 2024 election. The elimination of the BRIC program also especially deprives vulnerable communities across the Southeast, the CBS News data analysis found. 

    Earlier this month, a federal judge temporarily blocked the BRIC funding reallocation, arguing the transfer could lead to “irreparable harm” to flood-prone areas. Meanwhile, Collier says he has not heard any word from the federal government about next steps. 

    “We’re kind of in a limbo situation right now waiting to see what comes out of that,” Collier said.

    CBS News reached out to FEMA for a comment, but has not received a response. 

    Collier said if it comes down to it, he will pursue paying for the hazard mitigation plan out of pocket. 

    “Of course, it’s nicer when you have grant funds to work with, but at the same time, this is such a critically important thing that we need … If we can’t get the funding elsewhere, you know, we just have to just deal with it ourselves,” Collier said. “So, one way or the other, we’re going to get our plan in place.”

    Time is something Dauphin Island cannot afford. Even without a major hurricane, the beach is expected to continue washing away.

    Asked what keeps him up at night, Collier said, “just the fact that we know additional hurricanes will eventually hit this area … knowing that there’s a clock ticking, that we only have a certain length of time in order to make differences and changes on the island before the next one hits.”

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