You generally don’t need sudo to install flatpaks and actually pretty sure they advise against it.

https://www.antena3.com/noticias/economia/cni-apunta-ciberataque-como-motivo-apagon-electrico-generalizado-espana_20250428680f78ac5d71dc778a92db60.html

Telecinco Noticias were reporting that.

Spanish news media reporting 6 ton10 hours to fully restore power to all regions.

Also still investigating the cause but suspicion falling on a cyber attack.

Antena3 News If you can read Spanish this is informative but also has videos of various impacts.