DRIHM recently presented its analysis of the Genoa flash flood at the Genoa festival of science and there is a nice write up - including an interview of Antonio Parodi - in the Business Journal Liguria (in Italian):

www.bjliguria.it/2014/10/quando-natura-spiazza-scienza/

(article seems to respond relatively well to Google translate, too).

The article presents quite nicely the limitations of "single model" approach and the need to combine models and applying probabilistic analysis in order to improve accuracy.