Cuba's state energy firm UNE reported a nationwide blackout on Sunday, citing a total disconnection of the national electricity system. The outage plunged the country, including the capital Havana, into darkness, marking the latest in a series of grid collapses. Residents have faced significant disruption to daily life, with power cuts impacting water supplies and basic amenities. The country has been experiencing rolling blackouts due to a combination of aging infrastructure and a U.S. energy embargo that has restricted fuel deliveries. The Ministry of Energy has stated that efforts to reactivate the grid are in progress. The U.S. has maintained sanctions against Cuban state-owned businesses, which have prompted foreign firms to suspend operations. The Trump administration had previously authorized the arrival of a single Russian tanker with crude oil in March, but those reserves have since been depleted. Talks between Havana and Washington have reportedly made little progress.