Since Shepperson as invisible hand offered the market woth supply of generators which was struck by hurricane the demand was absolutely enormous such that Shepperson indulged in price gouging to an extent that he charged double the price at which he brought however he met the demand for generators and thus he reduced deadweight loss which is also known as cost to society due to market inefficiency when supply and demand are out of equilibrium.
Here he created and fulfilled demand with monopoly pricing which caused excess burden. However non availability of generators would have costed the city to import which would have been much higher than what Shepperson charged and hence he reduced deadweight loss or excess burden. Other condition here can be when prices are charged exorbitantly by Shepperson the overall demand itself reduces and forces consumers not to buy as the incentive reduces and thus demand equal quantity supplied which in turn brings prices down near equilibrium levels and thus causes the deadweight loss to decrease as well.

only the #19 Polchon, but out the same time discouraging consumers for buying more. As a...