The content has been shared, if you want to share this content with other users click here.
Authorities in Brazil are investigating an outage that left swaths of the country without electricity on Sunday night.
Consumers in the midwest, south and southeast regions were affected by the interruption, according to Luiz Eduardo Barata, head of grid operator ONS.
"You can totally rule out the theory that this was caused by higher consumption, it had nothing to do with hotter temperatures," Barata was quoted as saying by Reuters.
Barata said the outage was likely caused by equipment failure at the Ibiúna substation in São Paulo, operated by state-run utility Furnas.
Some consumers were left without electricity for more than half an hour, according to ONS.