Key Facts

• A big power cut happened in Spain and Portugal on Monday.
• Many people didn't have electricity, and things like the internet and phones didn't work.
• Trains were not running in some places. Traffic lights and airports also had problems.
• It took a few hours to start getting the electricity back in some areas.
• No one knew why the power cut happened, but Portugal's leader said it wasn't because someone hacked into their systems.
• People had trouble using things like card payments and some gas stations closed down.
• Some hospitals stopped doing regular work and made emergency plans.
• Some flights were delayed or cancelled.
• The power plants that use nuclear energy automatically stopped when the power cut happened. A Spanish oil company also stopped its work at oil refineries.