Guantánamo

Guantánamo is the easternmost Cuban province, sharing the island's southeastern corner with the US Naval Station Guantánamo Bay leased under a 1903 treaty. The provincial economy combines agriculture, coffee growing in the Sierra del Cristal foothills and limited tourism, and the province has historically had the weakest connection to the National Grid, with its thermoelectric capacity dominated by small diesel plants and isolated synchronisation arrangements.

At 06:09 on Thursday 14 May 2026, Guantánamo became the eastern endpoint of the partially disconnected segment of the Sistema Eléctrico Nacional that ran from Ciego de Ávila through the province. Unión Eléctrica Nacional reconnected the four central provinces sequentially through to 10:44, but Guantánamo, alongside Granma and Santiago de Cuba, continued operating on isolated local microsystems for vital services only. Hospitals, water pumps and refrigeration ran on diesel generators the country cannot reliably refuel.

Bloomberg satellite analysis using NASA Black Marble and Sentinel-2 imagery showed Guantánamo among the worst affected provinces by the up to 50 per cent island-wide drop in Cuban nighttime light, second only to Santiago de Cuba and Holguín. The province's structural position at the easternmost extremity of the grid corridor, dependent on transmission lines that pass through the Antonio Guiteras plant, makes Guantánamo the first province to lose synchronisation and the last to recover during fragmentation events.