Multiple disasters can have a cumulative impact leading to great human and financial loss. The awareness of all possible risks is of fundamental importance.

Flash floods are very localised weather events. They are mostly triggered by heavy rainfall. Typically, over a period of less than 12 hours. They occur very infrequently at any one place.

Guy Weets, a telecommunications engineer and consultant for the research centre AMRA (Analysis and Monitoring of Environmental Risk) in Naples, is the scientific coordinator of the CLUVA project, funded by the EU.