Media blather. This storm is not following the path of Katrina. Katrina crossed South Florida. Didn’t come up through Cuba. Katrina was also a much stronger storm.
The fact that Katrina was a larger and stronger storm is absolutely meaningless and irrelevant.
Issac is forecast to drop 15 inches of rain or so and if the eye makes landfall to the west of New Orleans for example, that means New Orleans would take a direct hit from the front right quadrant of the storm, something that did not occur in 2005.
That’s the worst part. They will get significant storm surge on top of the multiple inches of rainfall. The end result could be something very much similar to Katrina.
Don’t pay attention to he size and strength of these storms, pay attention to the amount of enclosed rain and where exactly the eye comes ashore.
Thankfully, Isaac is still a CAT 1, and unless he stalls and grows, doesn't have time to get much stronger, which means the storm surge won't be nearly as large as it was with Katrina.