By 3:08 a.m. on Tuesday, the CFE announced that the power supply was fully normalized across all four affected states, ending the nearly eight-hour outage. ^[1] The Federal Electricity Commission (CFE) confirmed that a blackout affecting over 2 million households in Yucatán, Quintana Roo, Campeche, and Chiapas was caused by vandalism to two high-tension transmission lines. ^[2] The Federal Electricity Commission (CFE) stated on August 31, 2026, that vandalism was responsible for a massive blackout across the Yucatan Peninsula. ^[3] At 12:09 a.m. on Tuesday, September 1, the utility formally attributed the failure to vandalism against insulators on the transmission lines, with recovery then at 25%. ^[4] The outage began minutes after 7 p.m. on Monday, August 31, and reached Mérida by approximately 7:21 p.m., cutting electricity across large parts of the city and surrounding towns. ^[5] CFE personnel identified the cause of the outage as vandalism targeting the insulators on two 400 kV high-voltage lines. ^[6] The blackout affected the states of Yucatán, Quintana Roo, Campeche, and Chiapas, with power loss starting around 8:00 p.m. on August 31, 2026, in Cancun. ^[7] The Federal Electricity Commission (CFE) confirmed that power supply has been fully restored to affected users in the states of Yucatán, Quintana Roo, Campeche, and Chiapas. ^[8]