New Delhi, April 29 -- A massive power outage in Spain, Portugal and parts of France left millions without electricity, affecting several essential services such as the metro and hospitals.

The incident also underscored the necessity of cash, as many faced difficulties shopping without access to electronic payment systems.

Several netizens have reacted to the power outage. Some have expressed their inconvenience, while others highlight dependency on electricity.

One of the users wrote, "Always carry some cash! In Spain and Portugal, many people couldn't shop during a power outage because they had no cash. When the power returned, everyone rushed to withdraw money, causing long lines at ATMs. Lesson: Don't rely only on cards or mobile p...