Percentages? Probably about the same.
Really?
The U.S. Census Bureau claims that as of 1 July 2005, Orleans county had a population of 437,186. According to Wikipedia, 1,836 people died as a result of Katrina.
Counting ONLY Orleans county, that comes to 0.004%. Are you sure a hurricane of Katrina's magnitude would have only killed less than one half of one percent of hunter-gatherers living in the same area, without the benefit of early warning or outside assistance?