Vigipirate (French: Plan Vigipirate) is France's national security alert system.^{[1][2][3][4][5][6]} Created in 1978 through interministerial sessions and falling within the responsibilities of the prime minister, it has since been updated three times: in 1995 (following a terror bombing campaign), 2000 and 2004.^{[citation needed]}

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Until 2014 the system defined four levels of threats represented by five colors: white, yellow, orange, red, scarlet. The levels called for specific security measures, including increased police or police/military mixed patrols in subways, train stations and other vulnerable locations.

In February 2014 the levels were simplified to 'vigilance' (or surveillance) and 'attack alert'.^[7] In December 2016, they were reorganized in three levels: 'vigilance', 'heightened security/risk of attack' and 'attack emergency'.^[8]

The name "Vigipirate" is an acronym of French: vigilance et protection des installations contre les risques d'attentats terroristes à l'explosif ("surveillance and protection of facilities against the risk of terrorist bombing attacks")

Wikimedia Commons has media related to Vigipirate.

• States of emergency in France
• Opération Sentinelle
• UK Threat Levels, used in the United Kingdom from 2006
  • BIKINI state, previously used in the United Kingdom
• Homeland Security Advisory System (United States)