When extreme natural disasters occur, powering critical loads is challenging. Losses to critical loads can be reduced by rationalizing the deployment of emergency resources. In this paper, emergency power and emergency energy storage are considered and a two-tier planning model is developed. The upper-tier model aims to minimize investment and load loss costs, and the lower-tier model aims to minimize combined load loss in multiple islanding scenarios. Finally, an arithmetic analysis of the IEEE33 node system shows that the method can consider economics while improving the ability of the distribution network to keep supply to important loads.