A flood involves water temporarily covering land that is usually not covered in water.
This includes floods caused by watercourses (e.g. rivers, mountain springs, streams that are normally dry) unable to cope with excessive water input.
Most of this input comes from heavy rainfall but other sources (such as coastal tides, storm surges or tsunamis) may also lead to flooding. Overflowing of sewer systems is not regarded as floods. Floods are a potential cause of incidents and population exoduses, inflicting damage on the environment and seriously disrupting economic development.
Prepared by ECRP - European Center for Risk Prevention (Sofia, Bulgaria) & the Editorial Board.