Catastrophic Emergency 3 : An emergency which has an exceptionally high and potentially widespread impact and requires immediate central government direction and support. (Civil Contingencies Secretariat)
Joint Emergency Services Interoperability Principles JESIP (Working Together Saving Lives), Glossary (Common Language within Emergency Services - A Sub-Set of the UK Civil Protection Lexicon), UK 2015. http://www.jesip.org.uk/glossary/, (Emr Common Lang - Brit) {929}