Territorial areas in which they divided the river basins are characterized by response to meteorological, hydrological and snow science homogeneous at the onset of risk.
Throughout the country, that there were 133 areas of warning, bounded taking into account the possible types of risk present and the evolution in space and time of the events and their effects
Weather vigilance areas
Territory portions in which the national territory is divided, following weather and climate criteria.
They are represented in the National weather vigilance bulletin and each of the 45 areas is matched with a background colour and, when necessarty, symbols to supply a simple but visual striking description of weather phenomena expected on the territory.
IndIdentification and consequent classification of zones in Italy, according to the hazard level of events expected in these areas. IIn seismological terms, attribution of a determined territory divided into zones, of a level of seismicity used to determine seismic actions and the application of technical regulations. The municipalities located in these zones are inserted into lists and classified accordingly.