On the evening of Friday, October 14, a fault in a transmission line in Mairiporã caused a significant blackout across several municipalities in Greater São Paulo, including Mairiporã, Franco da Rocha, Francisco Morato, Caieiras, and Cabreúva. The blackout followed severe weather conditions that included strong winds, which likely contributed to the transmission issues. Residents experienced sudden power loss, prompting the electricity distributor ISA Energia Brasil to coordinate with Elektro NeoEnergia, the local utility service provider, to restore electricity.

The incident began around 7:35 p.m., and it was reported that the heavy rainfall in the area led to complications such as fallen trees and flooding, further complicating the response efforts. The Neoenergia utility acknowledged the shutdown of the transmission line managed by ISA Energy, which directly impacted the substations serving the affected municipalities. With the situation still developing, residents were left without clear information about when power would be restored. The Franco da Rocha city hall has communicated that there is currently no established timeline for recovery of electricity service.

As local teams work to address the issues, the situation highlights the vulnerability of infrastructure to extreme weather events. The lack of immediate restoration timelines has raised concerns among residents about the adequacy of emergency preparedness and response capabilities in face of such disruptions. Ongoing communication from local authorities will be critical as the area copes with the aftermath of the storm and the blackout.