Over time, officials have identified some key factors in how Katrina caught so many places off guard.
Multiple communities had not tested their plans for evacuating people to safe locations. Also, in those and other areas, thousands of residents couldn’t or wouldn’t leave their threatened homes. Some hospitals lost power. And the storm knocked out cell phone towers, so many people could not call for help.
In response, the federal and state governments have made big changes. Congress passed laws to help states handle natural disasters. One law requires evacuation plans to include pets—one reason many people would not leave home during Katrina.
In addition, safeguards have been increased. Workers have built or restored hundreds of miles of levees. Building codes have also been updated in Gulf States. There are now stricter requirements for roofs, storm shutters, and even garage doors to help houses withstand hurricanes.
Training has also improved. Officials at all levels of government now go through the same disaster exercises. As a result, they can coordinate better when storms hit, says Keri Stephens, a professor at the University of Texas at Austin. She helps communities prepare for and recover from natural emergencies.
So far, the new measures have helped. In 2021, when Hurricane Ida hit New Orleans, the rebuilt levees worked. Ida, which knocked out power in some areas for weeks, was the most powerful storm to hit Louisiana in recent years.