The study shows that these big storms lower the long-run growth of the . economy and that their economic and human impacts ripple through the country for up to two decades. New Orleans hasn’t fully recovered from Hurricane Katrina in 2005. Many small businesses never bounced back. Ten years after the storm the unemployment rate was still highe r than pre-Katrina levels. Research shows that after most hurricanes more people tend to rely heavily on unemployment insurance and Medicaid , increasing the strain on those publicly funded programs, Jina said.