Hurricane Katrina made very little damage directly, as an effect of the energy of the wind. Almost all the damage was caused by the flood, which in turn turn wa

Hurricane Katrina made very little damage directly, as an effect of the energy of the wind. Almost all the damage was caused by the flood, which in turn turn was a consequence of the levees failing. It doesn’t make much sense to compare the energy released by Katrina to that of the Tonga eruption.