Power system components are crucial based on various complex connections inter-connections among them. Crucial power system components cause the vulnerability in the network. Any minor disturbance on one of few crucial power components can lead to massive outages and hence can cripple the entire nation. Traditional power contingency analysis tools are expensive to identify the crucial components. Also, such analysis are not scalable to measure vulnerability at national-scale. In this paper, we develop a real-time scoring module which provides a metric to represent the cruciality of a power system component. Through a case-study in a disaster impacted regions, we show that our scoring module is better than traditional and popular network-centrality measure techniques.