Just read this:
Since records began in 1851, a category 4 or 5 hurricane has never made landfall in southwestern Louisiana or far southeast Texas. Even if you've ridden out strong hurricanes in the past, you're not going to want to ride out this one. Parts of southwest Louisiana and far southeast Texas will experience historic storm surge from Laura. Also keep in mind that Laura will be making landfall when it's dark.
Even though the Saffir-Simpson scale is widely used to categorize hurricanes based on sustained wind speed, remember that it does have its limitations. Remember, Hurricane Katrina actually made landfall as a category 3 storm. There are many examples of hurricanes that were catastrophic but didn't rank as high on the Saffir-Simpson scale at/near landfall. That's why it's so important to assess the potential impacts of a hurricane on a storm-by-storm basis. With Laura, the storm surge will likely be the primary killer, and even those who have lived through powerful hurricanes in the past have likely never experienced anything like what's about to happen.