E-Redes reveals that "during these interventions, manoeuvres, connections, repairs or maintenance work on the infrastructure are carried out, always in a planned and controlled manner."

According to information on the E-Redes website, the six scheduled interruptions for 30 November are as follows:

Faro/Loulé

Almancil Parish

7:00 AM to 11:00 AM

Mirante Street

Quarteira Parish

7:00 AM to 11:00 AM

Avenida Infante de Sagres

Faro/Portimão

Portimão Parish

5:30 AM to 10:00 AM

Padre Glória Square, Cerca do Colégio Street, Padre da Glória Street

Lisbon

Alcantara Parish

5:00 AM to 11:00 AM

Santo Amaro Dock

Campolide Parish

5:00 AM to 11:00 AM

José Malhoa Avenue, Cardeal Saraiva Street

Lisbon/Sintra

Union of Parishes of Almargem Do Bispo, Pêro Pinheiro E Montelavar

05:00 to 11:00

Estrada Da Serra, Entrada Lugar, Estrada Da Serra, Estrada Maceira, Lugar Serra Maceira, Rua António José Da Silva E Castro, Rua Dos Touros, Travessa António José Da Silva E Castro, Travessa Dos Trabalhadores

"Temporary and short-duration interruptions occur when all available power supply alternatives are exhausted, in order to ensure that the impact on customers is as minimal as possible," reads the company's website.

For safety reasons, it explains, "and in case of early restoration of the power supply or the need for technical tests, it is recommended that all installations be considered permanently energized".

"Scheduled maintenance work on the distribution network is carried out under Articles 72 and 75 of the Regulation on Commercial Relations in the Electricity and Gas Sector," reads the E-Redes website.

The company says that "as a result of this commitment, and as reported by the CEER (Council of European Energy Regulators), E-REDES is considered a European benchmark in terms of carrying out scheduled interventions with minimal impact on supply."

E-Redes has clarified that the "scheduled power outages" due to work on the distribution network are "regular" maintenance situations.

"It's nothing out of the ordinary," a source from the E-Redes operator told Lusa, adding that "this type of work happens every Sunday."

According to the same source, the locations where "scheduled outages" occur due to "maintenance work" are always announced in advance on the company's website.

Furthermore, according to the operator, "these interruptions also serve to correct situations that may generate insecurity in the electrical network and/or to prevent failures."