Two thousand passengers were trapped on three high-speed French TGV trains after a massive power outage on a line to Paris from the Spanish border.
One train arrived in the French capital more than a day late, prompting furious travellers to warn they were stuck in potential Covid-19 clusters without food, drink or toilet paper.
The train from Hendaye carried hundreds of holidaymakers back to the French capital for la rentrée - the return to work and school after the long summer.
It was due to leave shortly before midday on Sunday and arrive in the French capital that afternoon after a five-hour journey.
But it came to a halt in the remote Landes region well before reaching Bordeaux due to an "exceptional" succession of electrical faults on the line, according to SNCF, the national operator.