Thinking about a scenario with possible risk of flooding and landslides caused by weather conditions, it results really interesting to investigate the way in which citizens take decisions on the basis of different information sources they can access. In this work we start describing a platform we realized in order to study this social phenomenon. Then we present some simulative experiments showing how a population of cognitive agents trusting in a different way their information sources can make decisions more or less suited to the several weather patterns. The complexity of decisions is based on the fact that the agents differently trust the various sources of information, which in turn may be differently trustworthy. In our simulations we analyse some interesting case studies, with particular reference to social agents that need to wait others in order to make decision.