Barcelona’s Champions League clash with Inter Milan on Wednesday is at reportedly risk of suspension due to the power outage that has wreaked havoc in Europe. Nationwide blackouts in Spain and Portugal have caused chaos, while parts of France are also said to be affected.

Inter are due to fly to Barcelona tomorrow, 24 hours ahead of the first leg of their European semi-final against the La Liga club. However, their trip may be impacted by huge backlogs in flights. Spanish airports have been badly affected by the outages, with delays of several hours currently expected.

Aviation analytics firm Cirium has reported that there were expected to be 3,005 departures from and 3,005 arrivals into Spanish airports, with Madrid expected to see the largest number of flights, followed by Barcelona. Many of those flights could be delayed or cancelled, potentially impacting Inter.

According to Spanish publication El Desmarque de Cuatro, Inter may not be able to travel to Barcelona tomorrow if the problem continues. That would place the Champions League match between the two clubs at risk of postponement.

If the game is delayed, rescheduling the fixture would be tricky. There is the potential to push it back by a day to Thursday, but both teams are due to play league matches 48 hours later. Barca face Real Valladolid in La Liga on Saturday evening, while Inter host Verona in Serie A.

The second leg is scheduled to take place next Tuesday, while Barca do not have a free midweek until the week commencing May 19. The Champions League final is due to be played in Munich on May 31.

Arsenal face Paris Saint-Germain in the other semi-final tie. Who plays in the final will be decided in the respective second legs next week.

Meanwhile, in a concerning update, Spain’s electricity grid has estimated that it could take six to 10 hours for power to return. Internet users started reporting issues at around 12:30pm local time.

Earlier today, Spanish officials were investigating a potential cyber attack. However, the cyber security wing of the European Union has now veered away from that being the cause. The European Union Agency for Cybersecurity believe it is likely to be a technical or cable fault.

The blackout has serious affected travel, with videos on social media showing traffic in Spain and Portugal at a standstill with traffic lights and digital displays not working. In Madrid, citizens were warned not to travel.

Play at the Madrid Open was also suspended. The power cut meant the electronic line-calling system – which has replaced line judges – and scoreboards stopped working.