Technological and energetic networks display functional interdependency effects which should be evaluated and accounted for when control and healing strategies have to be envisaged. Topological and functional emulations (based on available data) of interconnected networks might help in shedding some light on the complex entanglement binding different technological networks. The case of electrical and telecommunication networks is discussed and presented in a framework of a decision support system which, starting from the evaluation of networks vulnerabilities, is able to produce crises scenarios whose impacts on the networks are evaluated.