EUwarn (proper spelling: EUWARN) – also KATWARN international – is a European warning and information system according to Article 110 EU Directive (EU) 2018/1972. EUwarn / Katwarn-international is used by the European Commission in Brussels and Luxembourg and by the Austrian Federal Ministry of the Interior to inform affected target groups via smartphone app in dangerous situations (e.g., major fires, power outages, terrorist attacks, or pandemics). The system is technically based on the KATWARN warning system, which has been in use in Germany since 2011, and is networked through roaming technology. From Wikipedia
